diff --git a/baseapp/abci.go b/baseapp/abci.go
index 6c6bd2f81e..924a9f8191 100644
--- a/baseapp/abci.go
+++ b/baseapp/abci.go
@@ -420,9 +420,6 @@ func (app *BaseApp) Query(req abci.RequestQuery) (res abci.ResponseQuery) {
 
 	case QueryPathP2P:
 		return handleQueryP2P(app, path)
-
-	case QueryPathCustom:
-		return handleQueryCustom(app, path, req)
 	}
 
 	return sdkerrors.QueryResult(sdkerrors.Wrap(sdkerrors.ErrUnknownRequest, "unknown query path"), app.trace)
@@ -816,43 +813,6 @@ func handleQueryP2P(app *BaseApp, path []string) abci.ResponseQuery {
 	return resp
 }
 
-func handleQueryCustom(app *BaseApp, path []string, req abci.RequestQuery) abci.ResponseQuery {
-	// path[0] should be "custom" because "/custom" prefix is required for keeper
-	// queries.
-	//
-	// The QueryRouter routes using path[1]. For example, in the path
-	// "custom/gov/proposal", QueryRouter routes using "gov".
-	if len(path) < 2 || path[1] == "" {
-		return sdkerrors.QueryResult(sdkerrors.Wrap(sdkerrors.ErrUnknownRequest, "no route for custom query specified"), app.trace)
-	}
-
-	querier := app.queryRouter.Route(path[1])
-	if querier == nil {
-		return sdkerrors.QueryResult(sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "no custom querier found for route %s", path[1]), app.trace)
-	}
-
-	ctx, err := app.createQueryContext(req.Height, req.Prove)
-	if err != nil {
-		return sdkerrors.QueryResult(err, app.trace)
-	}
-
-	// Passes the rest of the path as an argument to the querier.
-	//
-	// For example, in the path "custom/gov/proposal/test", the gov querier gets
-	// []string{"proposal", "test"} as the path.
-	resBytes, err := querier(ctx, path[2:], req)
-	if err != nil {
-		res := sdkerrors.QueryResult(err, app.trace)
-		res.Height = req.Height
-		return res
-	}
-
-	return abci.ResponseQuery{
-		Height: req.Height,
-		Value:  resBytes,
-	}
-}
-
 // SplitABCIQueryPath splits a string path using the delimiter '/'.
 //
 // e.g. "this/is/funny" becomes []string{"this", "is", "funny"}
diff --git a/baseapp/baseapp.go b/baseapp/baseapp.go
index e199a67c2f..cab7aa27e5 100644
--- a/baseapp/baseapp.go
+++ b/baseapp/baseapp.go
@@ -48,7 +48,6 @@ type BaseApp struct { //nolint: maligned
 	db                dbm.DB               // common DB backend
 	cms               sdk.CommitMultiStore // Main (uncached) state
 	storeLoader       StoreLoader          // function to handle store loading, may be overridden with SetStoreLoader()
-	queryRouter       sdk.QueryRouter      // router for redirecting query calls
 	grpcQueryRouter   *GRPCQueryRouter     // router for redirecting gRPC query calls
 	msgServiceRouter  *MsgServiceRouter    // router for redirecting Msg service messages
 	interfaceRegistry codectypes.InterfaceRegistry
@@ -147,7 +146,6 @@ func NewBaseApp(
 		db:               db,
 		cms:              store.NewCommitMultiStore(db),
 		storeLoader:      DefaultStoreLoader,
-		queryRouter:      NewQueryRouter(),
 		grpcQueryRouter:  NewGRPCQueryRouter(),
 		msgServiceRouter: NewMsgServiceRouter(),
 		txDecoder:        txDecoder,
@@ -364,9 +362,6 @@ func (app *BaseApp) setIndexEvents(ie []string) {
 	}
 }
 
-// QueryRouter returns the QueryRouter of a BaseApp.
-func (app *BaseApp) QueryRouter() sdk.QueryRouter { return app.queryRouter }
-
 // Seal seals a BaseApp. It prohibits any further modifications to a BaseApp.
 func (app *BaseApp) Seal() { app.sealed = true }
 
diff --git a/baseapp/queryrouter.go b/baseapp/queryrouter.go
deleted file mode 100644
index 1727b2ab2d..0000000000
--- a/baseapp/queryrouter.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package baseapp
-
-import (
-	"fmt"
-
-	sdk "github.com/cosmos/cosmos-sdk/types"
-)
-
-type QueryRouter struct {
-	routes map[string]sdk.Querier
-}
-
-var _ sdk.QueryRouter = NewQueryRouter()
-
-// NewQueryRouter returns a reference to a new QueryRouter.
-func NewQueryRouter() *QueryRouter {
-	return &QueryRouter{
-		routes: map[string]sdk.Querier{},
-	}
-}
-
-// AddRoute adds a query path to the router with a given Querier. It will panic
-// if a duplicate route is given. The route must be alphanumeric.
-func (qrt *QueryRouter) AddRoute(path string, q sdk.Querier) sdk.QueryRouter {
-	if !sdk.IsAlphaNumeric(path) {
-		panic("route expressions can only contain alphanumeric characters")
-	}
-
-	if qrt.routes[path] != nil {
-		panic(fmt.Sprintf("route %s has already been initialized", path))
-	}
-
-	qrt.routes[path] = q
-
-	return qrt
-}
-
-// Route returns the Querier for a given query route path.
-func (qrt *QueryRouter) Route(path string) sdk.Querier {
-	return qrt.routes[path]
-}
diff --git a/baseapp/queryrouter_test.go b/baseapp/queryrouter_test.go
deleted file mode 100644
index c7637f1700..0000000000
--- a/baseapp/queryrouter_test.go
+++ /dev/null
@@ -1,33 +0,0 @@
-package baseapp
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-
-	abci "github.com/tendermint/tendermint/abci/types"
-
-	sdk "github.com/cosmos/cosmos-sdk/types"
-)
-
-var testQuerier = func(_ sdk.Context, _ []string, _ abci.RequestQuery) ([]byte, error) {
-	return nil, nil
-}
-
-func TestQueryRouter(t *testing.T) {
-	qr := NewQueryRouter()
-
-	// require panic on invalid route
-	require.Panics(t, func() {
-		qr.AddRoute("*", testQuerier)
-	})
-
-	qr.AddRoute("testRoute", testQuerier)
-	q := qr.Route("testRoute")
-	require.NotNil(t, q)
-
-	// require panic on duplicate route
-	require.Panics(t, func() {
-		qr.AddRoute("testRoute", testQuerier)
-	})
-}