diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c21957809f..0b2866e6764 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,6 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### API Breaking
 
+* (modules) [\#162](https://github.com/cosmos/ibc-go/pull/162) Remove deprecated Handler types in core IBC and the ICS 20 transfer module. 
 * (modules/core) [\#161](https://github.com/cosmos/ibc-go/pull/161) Remove Type(), Route(), GetSignBytes() from 02-client, 03-connection, and 04-channel messages.
 * (modules) [\#140](https://github.com/cosmos/ibc-go/pull/140) IsFrozen() client state interface changed to Status(). gRPC `ClientStatus` route added.
 * (modules/core) [\#109](https://github.com/cosmos/ibc-go/pull/109) Remove connection and channel handshake CLI commands.
diff --git a/modules/apps/transfer/handler.go b/modules/apps/transfer/handler.go
deleted file mode 100644
index f6a0ace3d66..00000000000
--- a/modules/apps/transfer/handler.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package transfer
-
-import (
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
-	"github.com/cosmos/ibc-go/modules/apps/transfer/types"
-)
-
-// NewHandler returns sdk.Handler for IBC token transfer module messages
-func NewHandler(k types.MsgServer) sdk.Handler {
-	return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
-		ctx = ctx.WithEventManager(sdk.NewEventManager())
-
-		switch msg := msg.(type) {
-		case *types.MsgTransfer:
-			res, err := k.Transfer(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		default:
-			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized ICS-20 transfer message type: %T", msg)
-		}
-	}
-}
diff --git a/modules/apps/transfer/module.go b/modules/apps/transfer/module.go
index c19a740ba8b..b0addfafed3 100644
--- a/modules/apps/transfer/module.go
+++ b/modules/apps/transfer/module.go
@@ -109,7 +109,7 @@ func (AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
 
 // Route implements the AppModule interface
 func (am AppModule) Route() sdk.Route {
-	return sdk.NewRoute(types.RouterKey, NewHandler(am.keeper))
+	return sdk.Route{}
 }
 
 // QuerierRoute implements the AppModule interface
diff --git a/modules/apps/transfer/handler_test.go b/modules/apps/transfer/transfer_test.go
similarity index 100%
rename from modules/apps/transfer/handler_test.go
rename to modules/apps/transfer/transfer_test.go
diff --git a/modules/core/handler.go b/modules/core/handler.go
deleted file mode 100644
index 3384bbcfedc..00000000000
--- a/modules/core/handler.go
+++ /dev/null
@@ -1,98 +0,0 @@
-package ibc
-
-import (
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
-	clienttypes "github.com/cosmos/ibc-go/modules/core/02-client/types"
-	connectiontypes "github.com/cosmos/ibc-go/modules/core/03-connection/types"
-	channeltypes "github.com/cosmos/ibc-go/modules/core/04-channel/types"
-	"github.com/cosmos/ibc-go/modules/core/keeper"
-)
-
-// NewHandler defines the IBC handler
-func NewHandler(k keeper.Keeper) sdk.Handler {
-	return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
-		ctx = ctx.WithEventManager(sdk.NewEventManager())
-
-		switch msg := msg.(type) {
-		// IBC client msg interface types
-		case *clienttypes.MsgCreateClient:
-			res, err := k.CreateClient(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *clienttypes.MsgUpdateClient:
-			res, err := k.UpdateClient(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *clienttypes.MsgUpgradeClient:
-			res, err := k.UpgradeClient(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *clienttypes.MsgSubmitMisbehaviour:
-			res, err := k.SubmitMisbehaviour(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		// IBC connection msgs
-		case *connectiontypes.MsgConnectionOpenInit:
-			res, err := k.ConnectionOpenInit(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *connectiontypes.MsgConnectionOpenTry:
-			res, err := k.ConnectionOpenTry(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *connectiontypes.MsgConnectionOpenAck:
-			res, err := k.ConnectionOpenAck(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *connectiontypes.MsgConnectionOpenConfirm:
-			res, err := k.ConnectionOpenConfirm(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		// IBC channel msgs
-		case *channeltypes.MsgChannelOpenInit:
-			res, err := k.ChannelOpenInit(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgChannelOpenTry:
-			res, err := k.ChannelOpenTry(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgChannelOpenAck:
-			res, err := k.ChannelOpenAck(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgChannelOpenConfirm:
-			res, err := k.ChannelOpenConfirm(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgChannelCloseInit:
-			res, err := k.ChannelCloseInit(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgChannelCloseConfirm:
-			res, err := k.ChannelCloseConfirm(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		// IBC packet msgs get routed to the appropriate module callback
-		case *channeltypes.MsgRecvPacket:
-			res, err := k.RecvPacket(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgAcknowledgement:
-			res, err := k.Acknowledgement(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgTimeout:
-			res, err := k.Timeout(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		case *channeltypes.MsgTimeoutOnClose:
-			res, err := k.TimeoutOnClose(sdk.WrapSDKContext(ctx), msg)
-			return sdk.WrapServiceResult(ctx, res, err)
-
-		default:
-			return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized IBC message type: %T", msg)
-		}
-	}
-}
diff --git a/modules/core/module.go b/modules/core/module.go
index c00d644846f..1d338dcb69e 100644
--- a/modules/core/module.go
+++ b/modules/core/module.go
@@ -117,7 +117,7 @@ func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
 
 // Route returns the message routing key for the ibc module.
 func (am AppModule) Route() sdk.Route {
-	return sdk.NewRoute(host.RouterKey, NewHandler(*am.keeper))
+	return sdk.Route{}
 }
 
 // QuerierRoute returns the ibc module's querier route name.