diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c32cf5f40a..1cbb65c163f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -126,6 +126,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [\#9699](https://github.com/cosmos/cosmos-sdk/pull/9699) Add `:`, `.`, `-`, and `_` as allowed characters in the default denom regular expression.
 * (genesis) [\#9697](https://github.com/cosmos/cosmos-sdk/pull/9697) Ensure `InitGenesis` returns with non-empty validator set.
 * [\#10262](https://github.com/cosmos/cosmos-sdk/pull/10262) Remove unnecessary logging in `x/feegrant` simulation.
+* [\#10341](https://github.com/cosmos/cosmos-sdk/pull/10341) Move from `io/ioutil` to `io` and `os` packages.
 
 ### Bug Fixes
 
diff --git a/baseapp/baseapp_test.go b/baseapp/baseapp_test.go
index 5d77a16469c..b542dce0d13 100644
--- a/baseapp/baseapp_test.go
+++ b/baseapp/baseapp_test.go
@@ -5,7 +5,6 @@ import (
 	"encoding/binary"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"math"
 	"math/rand"
 	"os"
@@ -162,7 +161,7 @@ func setupBaseAppWithSnapshots(t *testing.T, blocks uint, blockTxs int, options
 
 	snapshotInterval := uint64(2)
 	snapshotTimeout := 1 * time.Minute
-	snapshotDir, err := ioutil.TempDir("", "baseapp")
+	snapshotDir, err := os.MkdirTemp("", "baseapp")
 	require.NoError(t, err)
 	snapshotStore, err := snapshots.NewStore(dbm.NewMemDB(), snapshotDir)
 	require.NoError(t, err)
@@ -934,7 +933,7 @@ func incrementingCounter(t *testing.T, store sdk.KVStore, counterKey []byte, cou
 	return &sdk.Result{}, nil
 }
 
-//---------------------------------------------------------------------
+// ---------------------------------------------------------------------
 // Tx processing - CheckTx, DeliverTx, SimulateTx.
 // These tests use the serialized tx as input, while most others will use the
 // Check(), Deliver(), Simulate() methods directly.
diff --git a/client/config/config_test.go b/client/config/config_test.go
index c058edf8301..a7a7232cb8f 100644
--- a/client/config/config_test.go
+++ b/client/config/config_test.go
@@ -3,7 +3,7 @@ package config_test
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"testing"
 
@@ -58,7 +58,7 @@ func TestConfigCmd(t *testing.T) {
 	cmd.SetOut(b)
 	cmd.SetArgs([]string{"node"})
 	cmd.Execute()
-	out, err := ioutil.ReadAll(b)
+	out, err := io.ReadAll(b)
 	require.NoError(t, err)
 	require.Equal(t, string(out), testNode1+"\n")
 }
diff --git a/client/config/toml.go b/client/config/toml.go
index 0393a5b6acc..a26cf78e6f1 100644
--- a/client/config/toml.go
+++ b/client/config/toml.go
@@ -2,7 +2,6 @@ package config
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"text/template"
 
@@ -43,7 +42,7 @@ func writeConfigToFile(configFilePath string, config *ClientConfig) error {
 		return err
 	}
 
-	return ioutil.WriteFile(configFilePath, buffer.Bytes(), 0600)
+	return os.WriteFile(configFilePath, buffer.Bytes(), 0600)
 }
 
 // ensureConfigPath creates a directory configPath if it does not exist
diff --git a/client/keys/add_ledger_test.go b/client/keys/add_ledger_test.go
index 2b106615bcd..1901a3e3261 100644
--- a/client/keys/add_ledger_test.go
+++ b/client/keys/add_ledger_test.go
@@ -6,7 +6,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -188,7 +188,7 @@ func Test_runAddCmdLedgerDryRun(t *testing.T) {
 				_, err = kb.Key("testkey")
 				require.NoError(t, err)
 
-				out, err := ioutil.ReadAll(b)
+				out, err := io.ReadAll(b)
 				require.NoError(t, err)
 				require.Contains(t, string(out), "name: testkey")
 			} else {
diff --git a/client/keys/add_test.go b/client/keys/add_test.go
index 1db73799111..b47210194cf 100644
--- a/client/keys/add_test.go
+++ b/client/keys/add_test.go
@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -18,7 +18,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/simapp"
 	"github.com/cosmos/cosmos-sdk/testutil"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	bip39 "github.com/cosmos/go-bip39"
+	"github.com/cosmos/go-bip39"
 )
 
 func Test_runAddCmdBasic(t *testing.T) {
@@ -220,7 +220,7 @@ func Test_runAddCmdDryRun(t *testing.T) {
 				_, err := kb.Key("testkey")
 				require.NoError(t, err)
 
-				out, err := ioutil.ReadAll(b)
+				out, err := io.ReadAll(b)
 				require.NoError(t, err)
 				require.Contains(t, string(out), "name: testkey")
 			} else {
diff --git a/client/keys/import.go b/client/keys/import.go
index 36662a8dd2e..a9d5c185acb 100644
--- a/client/keys/import.go
+++ b/client/keys/import.go
@@ -2,7 +2,7 @@ package keys
 
 import (
 	"bufio"
-	"io/ioutil"
+	"os"
 
 	"github.com/spf13/cobra"
 
@@ -24,7 +24,7 @@ func ImportKeyCommand() *cobra.Command {
 			}
 			buf := bufio.NewReader(clientCtx.Input)
 
-			bz, err := ioutil.ReadFile(args[1])
+			bz, err := os.ReadFile(args[1])
 			if err != nil {
 				return err
 			}
diff --git a/client/keys/import_test.go b/client/keys/import_test.go
index 37f4f3ce6bf..b481285200d 100644
--- a/client/keys/import_test.go
+++ b/client/keys/import_test.go
@@ -3,7 +3,6 @@ package keys
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -98,7 +97,7 @@ HbP+c6JmeJy9JXe2rbbF1QtCX1gLqGcDQPBXiCtFvP7/8wTZtVOPj8vREzhZ9ElO
 
 			keyfile := filepath.Join(kbHome, "key.asc")
 
-			require.NoError(t, ioutil.WriteFile(keyfile, []byte(armoredKey), 0644))
+			require.NoError(t, os.WriteFile(keyfile, []byte(armoredKey), 0644))
 
 			defer func() {
 				_ = os.RemoveAll(kbHome)
diff --git a/codec/unknownproto/unknown_fields.go b/codec/unknownproto/unknown_fields.go
index b9db6429628..36b745e1e04 100644
--- a/codec/unknownproto/unknown_fields.go
+++ b/codec/unknownproto/unknown_fields.go
@@ -5,7 +5,7 @@ import (
 	"compress/gzip"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"reflect"
 	"strings"
 	"sync"
@@ -358,7 +358,7 @@ func extractFileDescMessageDesc(desc descriptorIface) (*descriptor.FileDescripto
 	if err != nil {
 		return nil, nil, err
 	}
-	protoBlob, err := ioutil.ReadAll(gzr)
+	protoBlob, err := io.ReadAll(gzr)
 	if err != nil {
 		return nil, nil, err
 	}
diff --git a/container/container_test.go b/container/container_test.go
index 9bb072c9cd3..42f1ab0accb 100644
--- a/container/container_test.go
+++ b/container/container_test.go
@@ -2,7 +2,6 @@ package container_test
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"testing"
@@ -506,14 +505,14 @@ func TestLogging(t *testing.T) {
 	var logOut string
 	var dotGraph string
 
-	outfile, err := ioutil.TempFile("", "out")
+	outfile, err := os.CreateTemp("", "out")
 	require.NoError(t, err)
 	stdout := os.Stdout
 	os.Stdout = outfile
 	defer func() { os.Stdout = stdout }()
 	defer os.Remove(outfile.Name())
 
-	graphfile, err := ioutil.TempFile("", "graph")
+	graphfile, err := os.CreateTemp("", "graph")
 	require.NoError(t, err)
 	defer os.Remove(graphfile.Name())
 
@@ -533,11 +532,11 @@ func TestLogging(t *testing.T) {
 	require.Contains(t, logOut, "digraph")
 	require.Contains(t, dotGraph, "digraph")
 
-	outfileContents, err := ioutil.ReadFile(outfile.Name())
+	outfileContents, err := os.ReadFile(outfile.Name())
 	require.NoError(t, err)
 	require.Contains(t, string(outfileContents), "digraph")
 
-	graphfileContents, err := ioutil.ReadFile(graphfile.Name())
+	graphfileContents, err := os.ReadFile(graphfile.Name())
 	require.NoError(t, err)
 	require.Contains(t, string(graphfileContents), "<svg")
 }
diff --git a/cosmovisor/args.go b/cosmovisor/args.go
index 7b9343fea5d..c0c75996c3f 100644
--- a/cosmovisor/args.go
+++ b/cosmovisor/args.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -246,7 +245,7 @@ func (cfg *Config) UpgradeInfo() UpgradeInfo {
 	if err != nil { // no current directory
 		goto returnError
 	}
-	if bz, err = ioutil.ReadFile(filename); err != nil {
+	if bz, err = os.ReadFile(filename); err != nil {
 		goto returnError
 	}
 	if err = json.Unmarshal(bz, &u); err != nil {
diff --git a/cosmovisor/process.go b/cosmovisor/process.go
index 4b740f0956f..23f7edf1c21 100644
--- a/cosmovisor/process.go
+++ b/cosmovisor/process.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"os/signal"
@@ -113,7 +112,7 @@ func doBackup(cfg *Config) error {
 	if !cfg.UnsafeSkipBackup {
 		// check if upgrade-info.json is not empty.
 		var uInfo UpgradeInfo
-		upgradeInfoFile, err := ioutil.ReadFile(filepath.Join(cfg.Home, "data", "upgrade-info.json"))
+		upgradeInfoFile, err := os.ReadFile(filepath.Join(cfg.Home, "data", "upgrade-info.json"))
 		if err != nil {
 			return fmt.Errorf("error while reading upgrade-info.json: %w", err)
 		}
diff --git a/cosmovisor/upgrade.go b/cosmovisor/upgrade.go
index 6b683fd92ce..a0009e6e8e2 100644
--- a/cosmovisor/upgrade.go
+++ b/cosmovisor/upgrade.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -108,7 +107,7 @@ func GetDownloadURL(info UpgradeInfo) (string, error) {
 	doc := strings.TrimSpace(info.Info)
 	// if this is a url, then we download that and try to get a new doc with the real info
 	if _, err := url.Parse(doc); err == nil {
-		tmpDir, err := ioutil.TempDir("", "upgrade-manager-reference")
+		tmpDir, err := os.MkdirTemp("", "upgrade-manager-reference")
 		if err != nil {
 			return "", fmt.Errorf("create tempdir for reference file: %w", err)
 		}
@@ -119,7 +118,7 @@ func GetDownloadURL(info UpgradeInfo) (string, error) {
 			return "", fmt.Errorf("downloading reference link %s: %w", doc, err)
 		}
 
-		refBytes, err := ioutil.ReadFile(refPath)
+		refBytes, err := os.ReadFile(refPath)
 		if err != nil {
 			return "", fmt.Errorf("reading downloaded reference: %w", err)
 		}
diff --git a/crypto/hd/fundraiser_test.go b/crypto/hd/fundraiser_test.go
index d5c2b8f1ede..9cd3b15dfd5 100644
--- a/crypto/hd/fundraiser_test.go
+++ b/crypto/hd/fundraiser_test.go
@@ -4,7 +4,7 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -35,7 +35,7 @@ func initFundraiserTestVectors(t *testing.T) []addrData {
 	// var hdPath string = "m/44'/118'/0'/0/0"
 	var hdToAddrTable []addrData
 
-	b, err := ioutil.ReadFile("testdata/test.json")
+	b, err := os.ReadFile("testdata/test.json")
 	if err != nil {
 		t.Fatalf("could not read fundraiser test vector file (testdata/test.json): %s", err)
 	}
diff --git a/crypto/keyring/keyring.go b/crypto/keyring/keyring.go
index 9939ac4380a..156147eaaf4 100644
--- a/crypto/keyring/keyring.go
+++ b/crypto/keyring/keyring.go
@@ -5,7 +5,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -682,7 +681,7 @@ func newRealPrompt(dir string, buf io.Reader) func(string) (string, error) {
 
 		switch {
 		case err == nil:
-			keyhash, err = ioutil.ReadFile(keyhashFilePath)
+			keyhash, err = os.ReadFile(keyhashFilePath)
 			if err != nil {
 				return "", fmt.Errorf("failed to read %s: %v", keyhashFilePath, err)
 			}
@@ -746,7 +745,7 @@ func newRealPrompt(dir string, buf io.Reader) func(string) (string, error) {
 				continue
 			}
 
-			if err := ioutil.WriteFile(dir+"/keyhash", passwordHash, 0555); err != nil {
+			if err := os.WriteFile(dir+"/keyhash", passwordHash, 0555); err != nil {
 				return "", err
 			}
 
diff --git a/server/export.go b/server/export.go
index 150add98e78..4cbcf27d45e 100644
--- a/server/export.go
+++ b/server/export.go
@@ -4,7 +4,6 @@ package server
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -49,7 +48,7 @@ func ExportCmd(appExporter types.AppExporter, defaultNodeHome string) *cobra.Com
 					return err
 				}
 
-				genesis, err := ioutil.ReadFile(config.GenesisFile())
+				genesis, err := os.ReadFile(config.GenesisFile())
 				if err != nil {
 					return err
 				}
diff --git a/server/grpc/gogoreflection/serverreflection.go b/server/grpc/gogoreflection/serverreflection.go
index c2a0828e3bc..e98ffe1e141 100644
--- a/server/grpc/gogoreflection/serverreflection.go
+++ b/server/grpc/gogoreflection/serverreflection.go
@@ -41,7 +41,6 @@ import (
 	"compress/gzip"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"reflect"
 	"sort"
@@ -219,7 +218,7 @@ func decompress(b []byte) ([]byte, error) {
 	if err != nil {
 		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
 	}
-	out, err := ioutil.ReadAll(r)
+	out, err := io.ReadAll(r)
 	if err != nil {
 		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
 	}
diff --git a/server/grpc/grpc_web_test.go b/server/grpc/grpc_web_test.go
index 8fcdd216be7..37202fdfabb 100644
--- a/server/grpc/grpc_web_test.go
+++ b/server/grpc/grpc_web_test.go
@@ -7,7 +7,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/textproto"
 	"strconv"
@@ -197,7 +196,7 @@ func (s *GRPCWebTestSuite) makeGrpcRequest(
 		return nil, Trailer{}, nil, err
 	}
 	defer resp.Body.Close()
-	contents, err := ioutil.ReadAll(resp.Body)
+	contents, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, Trailer{}, nil, err
 	}
diff --git a/server/mock/helpers.go b/server/mock/helpers.go
index 88aacb4d8e4..334a21d9fd8 100644
--- a/server/mock/helpers.go
+++ b/server/mock/helpers.go
@@ -2,7 +2,6 @@ package mock
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -14,7 +13,7 @@ import (
 func SetupApp() (abci.Application, func(), error) {
 	logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout)).
 		With("module", "mock")
-	rootDir, err := ioutil.TempDir("", "mock-sdk")
+	rootDir, err := os.MkdirTemp("", "mock-sdk")
 	if err != nil {
 		return nil, nil, err
 	}
diff --git a/simapp/state.go b/simapp/state.go
index 5c568479e46..f888a45bcd8 100644
--- a/simapp/state.go
+++ b/simapp/state.go
@@ -4,8 +4,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
+	"os"
 	"time"
 
 	tmjson "github.com/tendermint/tendermint/libs/json"
@@ -55,7 +55,7 @@ func AppStateFn(cdc codec.JSONCodec, simManager *module.SimulationManager) simty
 
 		case config.ParamsFile != "":
 			appParams := make(simtypes.AppParams)
-			bz, err := ioutil.ReadFile(config.ParamsFile)
+			bz, err := os.ReadFile(config.ParamsFile)
 			if err != nil {
 				panic(err)
 			}
@@ -194,7 +194,7 @@ func AppStateRandomizedFn(
 // AppStateFromGenesisFileFn util function to generate the genesis AppState
 // from a genesis.json file.
 func AppStateFromGenesisFileFn(r io.Reader, cdc codec.JSONCodec, genesisFile string) (tmtypes.GenesisDoc, []simtypes.Account) {
-	bytes, err := ioutil.ReadFile(genesisFile)
+	bytes, err := os.ReadFile(genesisFile)
 	if err != nil {
 		panic(err)
 	}
diff --git a/simapp/utils.go b/simapp/utils.go
index a1614198b3d..51d8ef54020 100644
--- a/simapp/utils.go
+++ b/simapp/utils.go
@@ -3,7 +3,7 @@ package simapp
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/tendermint/tendermint/libs/log"
 	dbm "github.com/tendermint/tm-db"
@@ -34,7 +34,7 @@ func SetupSimulation(dirPrefix, dbName string) (simtypes.Config, dbm.DB, string,
 		logger = log.NewNopLogger()
 	}
 
-	dir, err := ioutil.TempDir("", dirPrefix)
+	dir, err := os.MkdirTemp("", dirPrefix)
 	if err != nil {
 		return simtypes.Config{}, nil, "", nil, false, err
 	}
@@ -56,7 +56,7 @@ func SimulationOperations(app App, cdc codec.JSONCodec, config simtypes.Config)
 	}
 
 	if config.ParamsFile != "" {
-		bz, err := ioutil.ReadFile(config.ParamsFile)
+		bz, err := os.ReadFile(config.ParamsFile)
 		if err != nil {
 			panic(err)
 		}
@@ -84,7 +84,7 @@ func CheckExportSimulation(
 			return err
 		}
 
-		if err := ioutil.WriteFile(config.ExportStatePath, []byte(exported.AppState), 0600); err != nil {
+		if err := os.WriteFile(config.ExportStatePath, []byte(exported.AppState), 0600); err != nil {
 			return err
 		}
 	}
@@ -96,7 +96,7 @@ func CheckExportSimulation(
 			return err
 		}
 
-		if err := ioutil.WriteFile(config.ExportParamsPath, paramsBz, 0600); err != nil {
+		if err := os.WriteFile(config.ExportParamsPath, paramsBz, 0600); err != nil {
 			return err
 		}
 	}
diff --git a/snapshots/helpers_test.go b/snapshots/helpers_test.go
index 70566791914..f530eadf21b 100644
--- a/snapshots/helpers_test.go
+++ b/snapshots/helpers_test.go
@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"errors"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -39,7 +38,7 @@ func hash(chunks [][]byte) []byte {
 func makeChunks(chunks [][]byte) <-chan io.ReadCloser {
 	ch := make(chan io.ReadCloser, len(chunks))
 	for _, chunk := range chunks {
-		ch <- ioutil.NopCloser(bytes.NewReader(chunk))
+		ch <- io.NopCloser(bytes.NewReader(chunk))
 	}
 	close(ch)
 	return ch
@@ -48,7 +47,7 @@ func makeChunks(chunks [][]byte) <-chan io.ReadCloser {
 func readChunks(chunks <-chan io.ReadCloser) [][]byte {
 	bodies := [][]byte{}
 	for chunk := range chunks {
-		body, err := ioutil.ReadAll(chunk)
+		body, err := io.ReadAll(chunk)
 		if err != nil {
 			panic(err)
 		}
@@ -76,7 +75,7 @@ func (m *mockSnapshotter) Restore(
 
 	m.chunks = [][]byte{}
 	for reader := range chunks {
-		chunk, err := ioutil.ReadAll(reader)
+		chunk, err := io.ReadAll(reader)
 		if err != nil {
 			return err
 		}
@@ -92,7 +91,7 @@ func (m *mockSnapshotter) Snapshot(height uint64, format uint32) (<-chan io.Read
 	}
 	ch := make(chan io.ReadCloser, len(m.chunks))
 	for _, chunk := range m.chunks {
-		ch <- ioutil.NopCloser(bytes.NewReader(chunk))
+		ch <- io.NopCloser(bytes.NewReader(chunk))
 	}
 	close(ch)
 	return ch, nil
@@ -101,10 +100,10 @@ func (m *mockSnapshotter) Snapshot(height uint64, format uint32) (<-chan io.Read
 // setupBusyManager creates a manager with an empty store that is busy creating a snapshot at height 1.
 // The snapshot will complete when the returned closer is called.
 func setupBusyManager(t *testing.T) *snapshots.Manager {
-	// ioutil.TempDir() is used instead of testing.T.TempDir()
+	// os.MkdirTemp() is used instead of testing.T.TempDir()
 	// see https://github.com/cosmos/cosmos-sdk/pull/8475 for
 	// this change's rationale.
-	tempdir, err := ioutil.TempDir("", "")
+	tempdir, err := os.MkdirTemp("", "")
 	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(tempdir) })
 
@@ -141,7 +140,7 @@ func (m *hungSnapshotter) Close() {
 func (m *hungSnapshotter) Snapshot(height uint64, format uint32) (<-chan io.ReadCloser, error) {
 	<-m.ch
 	ch := make(chan io.ReadCloser, 1)
-	ch <- ioutil.NopCloser(bytes.NewReader([]byte{}))
+	ch <- io.NopCloser(bytes.NewReader([]byte{}))
 	return ch, nil
 }
 
diff --git a/snapshots/manager.go b/snapshots/manager.go
index 3cb96e65f42..f1106505bc5 100644
--- a/snapshots/manager.go
+++ b/snapshots/manager.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"io"
-	"io/ioutil"
 	"sync"
 
 	"github.com/cosmos/cosmos-sdk/snapshots/types"
@@ -144,7 +143,7 @@ func (m *Manager) LoadChunk(height uint64, format uint32, chunk uint32) ([]byte,
 	}
 	defer reader.Close()
 
-	return ioutil.ReadAll(reader)
+	return io.ReadAll(reader)
 }
 
 // Prune prunes snapshots, if no other operations are in progress.
@@ -239,7 +238,7 @@ func (m *Manager) RestoreChunk(chunk []byte) (bool, error) {
 	}
 
 	// Pass the chunk to the restore, and wait for completion if it was the final one.
-	m.chRestore <- ioutil.NopCloser(bytes.NewReader(chunk))
+	m.chRestore <- io.NopCloser(bytes.NewReader(chunk))
 	m.restoreChunkIndex++
 
 	if int(m.restoreChunkIndex) >= len(m.restoreChunkHashes) {
diff --git a/snapshots/store_test.go b/snapshots/store_test.go
index 333031bc44c..77ff32a3c46 100644
--- a/snapshots/store_test.go
+++ b/snapshots/store_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"errors"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -20,10 +19,10 @@ import (
 )
 
 func setupStore(t *testing.T) *snapshots.Store {
-	// ioutil.TempDir() is used instead of testing.T.TempDir()
+	// os.MkdirTemp() is used instead of testing.T.TempDir()
 	// see https://github.com/cosmos/cosmos-sdk/pull/8475 for
 	// this change's rationale.
-	tempdir, err := ioutil.TempDir("", "")
+	tempdir, err := os.MkdirTemp("", "")
 	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(tempdir) })
 
@@ -195,7 +194,7 @@ func TestStore_Load(t *testing.T) {
 	for i := uint32(0); i < snapshot.Chunks; i++ {
 		reader, ok := <-chunks
 		require.True(t, ok)
-		chunk, err := ioutil.ReadAll(reader)
+		chunk, err := io.ReadAll(reader)
 		require.NoError(t, err)
 		err = reader.Close()
 		require.NoError(t, err)
@@ -220,7 +219,7 @@ func TestStore_LoadChunk(t *testing.T) {
 	chunk, err = store.LoadChunk(2, 1, 0)
 	require.NoError(t, err)
 	require.NotNil(t, chunk)
-	body, err := ioutil.ReadAll(chunk)
+	body, err := io.ReadAll(chunk)
 	require.NoError(t, err)
 	assert.Equal(t, []byte{2, 1, 0}, body)
 	err = chunk.Close()
@@ -314,7 +313,7 @@ func TestStore_Save(t *testing.T) {
 
 	ch := make(chan io.ReadCloser, 2)
 	ch <- pr
-	ch <- ioutil.NopCloser(bytes.NewBuffer([]byte{0xff}))
+	ch <- io.NopCloser(bytes.NewBuffer([]byte{0xff}))
 	close(ch)
 
 	_, err = store.Save(6, 1, ch)
diff --git a/snapshots/util_test.go b/snapshots/util_test.go
index 78c870b90a1..6935c082ad7 100644
--- a/snapshots/util_test.go
+++ b/snapshots/util_test.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"errors"
 	"io"
-	"io/ioutil"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -66,10 +65,10 @@ func TestChunkWriter(t *testing.T) {
 		require.NoError(t, err)
 		chunkWriter.CloseWithError(theErr)
 	}()
-	chunk, err := ioutil.ReadAll(<-ch)
+	chunk, err := io.ReadAll(<-ch)
 	require.NoError(t, err)
 	assert.Equal(t, []byte{1, 2}, chunk)
-	_, err = ioutil.ReadAll(<-ch)
+	_, err = io.ReadAll(<-ch)
 	require.Error(t, err)
 	assert.Equal(t, theErr, err)
 	assert.Empty(t, ch)
@@ -144,7 +143,7 @@ func TestChunkReader(t *testing.T) {
 	// Closing the reader should close the writer
 	pr, pw = io.Pipe()
 	pch = make(chan io.ReadCloser, 2)
-	pch <- ioutil.NopCloser(bytes.NewBuffer([]byte{1, 2, 3}))
+	pch <- io.NopCloser(bytes.NewBuffer([]byte{1, 2, 3}))
 	pch <- pr
 	close(pch)
 
diff --git a/store/rootmulti/store_test.go b/store/rootmulti/store_test.go
index 05817d6a841..a187fef762d 100644
--- a/store/rootmulti/store_test.go
+++ b/store/rootmulti/store_test.go
@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"testing"
 
@@ -842,7 +841,7 @@ func benchmarkMultistoreSnapshot(b *testing.B, stores uint8, storeKeys uint64) {
 		chunks, err := source.Snapshot(uint64(version), snapshottypes.CurrentFormat)
 		require.NoError(b, err)
 		for reader := range chunks {
-			_, err := io.Copy(ioutil.Discard, reader)
+			_, err := io.Copy(io.Discard, reader)
 			require.NoError(b, err)
 			err = reader.Close()
 			require.NoError(b, err)
diff --git a/testutil/ioutil.go b/testutil/ioutil.go
index 6a7e4fff9ce..6ff54d24ecb 100644
--- a/testutil/ioutil.go
+++ b/testutil/ioutil.go
@@ -3,7 +3,6 @@ package testutil
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -45,8 +44,8 @@ func ApplyMockIODiscardOutErr(c *cobra.Command) BufferReader {
 	mockIn := strings.NewReader("")
 
 	c.SetIn(mockIn)
-	c.SetOut(ioutil.Discard)
-	c.SetErr(ioutil.Discard)
+	c.SetOut(io.Discard)
+	c.SetErr(io.Discard)
 
 	return mockIn
 }
@@ -68,7 +67,7 @@ func WriteToNewTempFile(t testing.TB, s string) *os.File {
 func TempFile(t testing.TB) *os.File {
 	t.Helper()
 
-	fp, err := ioutil.TempFile(t.TempDir(), "")
+	fp, err := os.CreateTemp(t.TempDir(), "")
 	require.NoError(t, err)
 
 	return fp
diff --git a/testutil/ioutil_test.go b/testutil/ioutil_test.go
index 415e7842c15..03250fbab6a 100644
--- a/testutil/ioutil_test.go
+++ b/testutil/ioutil_test.go
@@ -1,7 +1,8 @@
 package testutil_test
 
 import (
-	"io/ioutil"
+	"io"
+	"os"
 	"testing"
 
 	"github.com/spf13/cobra"
@@ -28,7 +29,7 @@ func TestWriteToNewTempFile(t *testing.T) {
 	tempfile := testutil.WriteToNewTempFile(t, "test string")
 	tempfile.Close()
 
-	bs, err := ioutil.ReadFile(tempfile.Name())
+	bs, err := os.ReadFile(tempfile.Name())
 	require.NoError(t, err)
 	require.Equal(t, "test string", string(bs))
 }
@@ -39,6 +40,6 @@ func TestApplyMockIODiscardOutErr(t *testing.T) {
 
 	testutil.ApplyMockIODiscardOutErr(cmd)
 	require.NotEqual(t, cmd.InOrStdin(), oldStdin)
-	require.Equal(t, cmd.OutOrStdout(), ioutil.Discard)
-	require.Equal(t, cmd.ErrOrStderr(), ioutil.Discard)
+	require.Equal(t, cmd.OutOrStdout(), io.Discard)
+	require.Equal(t, cmd.ErrOrStderr(), io.Discard)
 }
diff --git a/testutil/rest.go b/testutil/rest.go
index b468b16bedd..58e6c39b197 100644
--- a/testutil/rest.go
+++ b/testutil/rest.go
@@ -1,7 +1,7 @@
 package testutil
 
 import (
-	"io/ioutil"
+	"io"
 	"net/http"
 )
 
@@ -25,7 +25,7 @@ func GetRequestWithHeaders(url string, headers map[string]string) ([]byte, error
 		return nil, err
 	}
 
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, err
 	}
diff --git a/testutil/rest/rest.go b/testutil/rest/rest.go
index 17dddaa6a55..e56ef90a201 100644
--- a/testutil/rest/rest.go
+++ b/testutil/rest/rest.go
@@ -5,7 +5,7 @@ package rest
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 )
 
@@ -18,7 +18,7 @@ func GetRequest(url string) ([]byte, error) {
 	}
 	defer res.Body.Close()
 
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, err
 	}
@@ -35,7 +35,7 @@ func PostRequest(url string, contentType string, data []byte) ([]byte, error) {
 	}
 	defer res.Body.Close()
 
-	bz, err := ioutil.ReadAll(res.Body)
+	bz, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, fmt.Errorf("error reading response body: %w", err)
 	}
diff --git a/x/auth/client/cli/tx_multisign.go b/x/auth/client/cli/tx_multisign.go
index 4f33ac75212..4044f8b3de2 100644
--- a/x/auth/client/cli/tx_multisign.go
+++ b/x/auth/client/cli/tx_multisign.go
@@ -2,7 +2,6 @@ package cli
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -393,14 +392,14 @@ func makeBatchMultisignCmd() func(cmd *cobra.Command, args []string) error {
 
 func unmarshalSignatureJSON(clientCtx client.Context, filename string) (sigs []signingtypes.SignatureV2, err error) {
 	var bytes []byte
-	if bytes, err = ioutil.ReadFile(filename); err != nil {
+	if bytes, err = os.ReadFile(filename); err != nil {
 		return
 	}
 	return clientCtx.TxConfig.UnmarshalSignatureJSON(bytes)
 }
 
 func readSignaturesFromFile(ctx client.Context, filename string) (sigs []signingtypes.SignatureV2, err error) {
-	bz, err := ioutil.ReadFile(filename)
+	bz, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}
diff --git a/x/auth/client/testutil/suite.go b/x/auth/client/testutil/suite.go
index e461efd869a..1ee016ef826 100644
--- a/x/auth/client/testutil/suite.go
+++ b/x/auth/client/testutil/suite.go
@@ -5,7 +5,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -334,7 +334,7 @@ func (s *IntegrationTestSuite) TestCLISignAminoJSON() {
 	fileFlag := fmt.Sprintf("--%s=%s", flags.FlagOutputDocument, filenameSigned)
 	_, err = TxSignExec(val1.ClientCtx, val1.Address, fileUnsigned.Name(), chainFlag, fileFlag, signModeAminoFlag)
 	require.NoError(err)
-	fContent, err := ioutil.ReadFile(filenameSigned)
+	fContent, err := os.ReadFile(filenameSigned)
 	require.NoError(err)
 	require.Equal(res.String(), string(fContent))
 
diff --git a/x/auth/client/tx.go b/x/auth/client/tx.go
index 05a7c65567b..a57f28d3d95 100644
--- a/x/auth/client/tx.go
+++ b/x/auth/client/tx.go
@@ -5,7 +5,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -95,9 +94,9 @@ func ReadTxFromFile(ctx client.Context, filename string) (tx sdk.Tx, err error)
 	var bytes []byte
 
 	if filename == "-" {
-		bytes, err = ioutil.ReadAll(os.Stdin)
+		bytes, err = io.ReadAll(os.Stdin)
 	} else {
-		bytes, err = ioutil.ReadFile(filename)
+		bytes, err = os.ReadFile(filename)
 	}
 
 	if err != nil {
diff --git a/x/auth/vesting/client/cli/tx.go b/x/auth/vesting/client/cli/tx.go
index 28c7e67dec9..74eb5633d25 100644
--- a/x/auth/vesting/client/cli/tx.go
+++ b/x/auth/vesting/client/cli/tx.go
@@ -3,7 +3,7 @@ package cli
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 
 	"github.com/spf13/cobra"
@@ -129,7 +129,7 @@ func NewMsgCreatePeriodicVestingAccountCmd() *cobra.Command {
 				return err
 			}
 
-			contents, err := ioutil.ReadFile(args[1])
+			contents, err := os.ReadFile(args[1])
 			if err != nil {
 				return err
 			}
diff --git a/x/distribution/client/cli/utils.go b/x/distribution/client/cli/utils.go
index 45f941f0897..ce7024dd2e3 100644
--- a/x/distribution/client/cli/utils.go
+++ b/x/distribution/client/cli/utils.go
@@ -1,7 +1,7 @@
 package cli
 
 import (
-	"io/ioutil"
+	"os"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/x/distribution/types"
@@ -11,7 +11,7 @@ import (
 func ParseCommunityPoolSpendProposalWithDeposit(cdc codec.JSONCodec, proposalFile string) (types.CommunityPoolSpendProposalWithDeposit, error) {
 	proposal := types.CommunityPoolSpendProposalWithDeposit{}
 
-	contents, err := ioutil.ReadFile(proposalFile)
+	contents, err := os.ReadFile(proposalFile)
 	if err != nil {
 		return proposal, err
 	}
diff --git a/x/genutil/client/cli/gentx.go b/x/genutil/client/cli/gentx.go
index c9128ae16dd..00ff11ab6f9 100644
--- a/x/genutil/client/cli/gentx.go
+++ b/x/genutil/client/cli/gentx.go
@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -225,7 +224,7 @@ func makeOutputFilepath(rootDir, nodeID string) (string, error) {
 }
 
 func readUnsignedGenTxFile(clientCtx client.Context, r io.Reader) (sdk.Tx, error) {
-	bz, err := ioutil.ReadAll(r)
+	bz, err := io.ReadAll(r)
 	if err != nil {
 		return nil, err
 	}
diff --git a/x/genutil/client/testutil/suite.go b/x/genutil/client/testutil/suite.go
index 99f007de002..f025160da6c 100644
--- a/x/genutil/client/testutil/suite.go
+++ b/x/genutil/client/testutil/suite.go
@@ -3,7 +3,7 @@ package testutil
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 
@@ -78,7 +78,7 @@ func (s *IntegrationTestSuite) TestGenTxCmd() {
 	open, err := os.Open(genTxFile)
 	s.Require().NoError(err)
 
-	all, err := ioutil.ReadAll(open)
+	all, err := io.ReadAll(open)
 	s.Require().NoError(err)
 
 	tx, err := val.ClientCtx.TxConfig.TxJSONDecoder()(all)
diff --git a/x/genutil/collect.go b/x/genutil/collect.go
index b93942e0ba0..008dd937d18 100644
--- a/x/genutil/collect.go
+++ b/x/genutil/collect.go
@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -79,8 +78,8 @@ func CollectTxs(cdc codec.JSONCodec, txJSONDecoder sdk.TxDecoder, moniker, genTx
 		return appGenTxs, persistentPeers, err
 	}
 
-	var fos []os.FileInfo
-	fos, err = ioutil.ReadDir(genTxsDir)
+	var fos []os.DirEntry
+	fos, err = os.ReadDir(genTxsDir)
 	if err != nil {
 		return appGenTxs, persistentPeers, err
 	}
@@ -107,7 +106,7 @@ func CollectTxs(cdc codec.JSONCodec, txJSONDecoder sdk.TxDecoder, moniker, genTx
 		}
 
 		// get the genTx
-		jsonRawTx, err := ioutil.ReadFile(filepath.Join(genTxsDir, fo.Name()))
+		jsonRawTx, err := os.ReadFile(filepath.Join(genTxsDir, fo.Name()))
 		if err != nil {
 			return appGenTxs, persistentPeers, err
 		}
diff --git a/x/genutil/collect_test.go b/x/genutil/collect_test.go
index 46e20f88f1b..837e16e6fc9 100644
--- a/x/genutil/collect_test.go
+++ b/x/genutil/collect_test.go
@@ -2,7 +2,6 @@ package genutil_test
 
 import (
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -38,7 +37,7 @@ func (dni *doNothingIterator) IterateGenesisBalances(_ codec.JSONCodec, _ map[st
 // Ensures that CollectTx correctly traverses directories and won't error out on encountering
 // a directory during traversal of the first level. See issue https://github.com/cosmos/cosmos-sdk/issues/6788.
 func TestCollectTxsHandlesDirectories(t *testing.T) {
-	testDir, err := ioutil.TempDir(os.TempDir(), "testCollectTxs")
+	testDir, err := os.MkdirTemp(os.TempDir(), "testCollectTxs")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/x/gov/client/cli/parse.go b/x/gov/client/cli/parse.go
index 90066b645ab..eeb814eb98e 100644
--- a/x/gov/client/cli/parse.go
+++ b/x/gov/client/cli/parse.go
@@ -3,7 +3,7 @@ package cli
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/spf13/pflag"
 
@@ -30,7 +30,7 @@ func parseSubmitProposalFlags(fs *pflag.FlagSet) (*proposal, error) {
 		}
 	}
 
-	contents, err := ioutil.ReadFile(proposalFile)
+	contents, err := os.ReadFile(proposalFile)
 	if err != nil {
 		return nil, err
 	}
diff --git a/x/params/client/utils/utils.go b/x/params/client/utils/utils.go
index 632c323247b..4c106913b01 100644
--- a/x/params/client/utils/utils.go
+++ b/x/params/client/utils/utils.go
@@ -2,7 +2,7 @@ package utils
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/x/params/types/proposal"
@@ -55,7 +55,7 @@ func (pcj ParamChangesJSON) ToParamChanges() []proposal.ParamChange {
 func ParseParamChangeProposalJSON(cdc *codec.LegacyAmino, proposalFile string) (ParamChangeProposalJSON, error) {
 	proposal := ParamChangeProposalJSON{}
 
-	contents, err := ioutil.ReadFile(proposalFile)
+	contents, err := os.ReadFile(proposalFile)
 	if err != nil {
 		return proposal, err
 	}
diff --git a/x/simulation/event_stats.go b/x/simulation/event_stats.go
index 0e4289fd243..9618385b8ff 100644
--- a/x/simulation/event_stats.go
+++ b/x/simulation/event_stats.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
+	"os"
 )
 
 // EventStats defines an object that keeps a tally of each event that has occurred
@@ -48,7 +48,7 @@ func (es EventStats) ExportJSON(path string) {
 		panic(err)
 	}
 
-	err = ioutil.WriteFile(path, bz, 0600)
+	err = os.WriteFile(path, bz, 0600)
 	if err != nil {
 		panic(err)
 	}
diff --git a/x/upgrade/keeper/keeper.go b/x/upgrade/keeper/keeper.go
index 21ab2b2a517..8b667ad3173 100644
--- a/x/upgrade/keeper/keeper.go
+++ b/x/upgrade/keeper/keeper.go
@@ -3,7 +3,6 @@ package keeper
 import (
 	"encoding/binary"
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -342,7 +341,7 @@ func (k Keeper) DumpUpgradeInfoToDisk(height int64, p types.Plan) error {
 		return err
 	}
 
-	return ioutil.WriteFile(upgradeInfoFilePath, info, 0600)
+	return os.WriteFile(upgradeInfoFilePath, info, 0600)
 }
 
 // GetUpgradeInfoPath returns the upgrade info file path
@@ -373,7 +372,7 @@ func (k Keeper) ReadUpgradeInfoFromDisk() (types.Plan, error) {
 		return upgradeInfo, err
 	}
 
-	data, err := ioutil.ReadFile(upgradeInfoPath)
+	data, err := os.ReadFile(upgradeInfoPath)
 	if err != nil {
 		// if file does not exist, assume there are no upgrades
 		if os.IsNotExist(err) {
diff --git a/x/upgrade/types/storeloader_test.go b/x/upgrade/types/storeloader_test.go
index 20e28888ed3..22d8ab45296 100644
--- a/x/upgrade/types/storeloader_test.go
+++ b/x/upgrade/types/storeloader_test.go
@@ -2,7 +2,6 @@ package types
 
 import (
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -77,7 +76,7 @@ func TestSetLoader(t *testing.T) {
 	data, err := json.Marshal(upgradeInfo)
 	require.NoError(t, err)
 
-	err = ioutil.WriteFile(upgradeInfoFilePath, data, 0644)
+	err = os.WriteFile(upgradeInfoFilePath, data, 0644)
 	require.NoError(t, err)
 
 	// make sure it exists before running everything