diff --git a/CHANGELOG.md b/CHANGELOG.md
index f41dbb3ddbf2..cb0cc6344df4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -54,6 +54,7 @@ Every module contains its own CHANGELOG.md. Please refer to the module you are i
 
 * (all) [#23445](https://github.com/cosmos/cosmos-sdk/pull/23445) Remove `v2` code from codebase.
 * (codec) [#22988](https://github.com/cosmos/cosmos-sdk/pull/22988) Improve edge case handling for recursion limits.
+* (proto) [#23437](https://github.com/cosmos/cosmos-sdk/pull/23437) Deprecate `Block` field from `GetBlockByHeightResponse` and return empty comet block for `GetBlockByHeight`.
 
 ### Bug Fixes
 
diff --git a/client/grpc/cmtservice/query.pb.go b/client/grpc/cmtservice/query.pb.go
index ff1675cb3a6e..b4d139a638fd 100644
--- a/client/grpc/cmtservice/query.pb.go
+++ b/client/grpc/cmtservice/query.pb.go
@@ -381,7 +381,7 @@ func (m *GetBlockByHeightRequest) GetHeight() int64 {
 type GetBlockByHeightResponse struct {
 	BlockId *v1.BlockID `protobuf:"bytes,1,opt,name=block_id,json=blockId,proto3" json:"block_id,omitempty"`
 	// Deprecated: please use `sdk_block` instead
-	Block    *v1.Block `protobuf:"bytes,2,opt,name=block,proto3" json:"block,omitempty"`
+	Block    *v1.Block `protobuf:"bytes,2,opt,name=block,proto3" json:"block,omitempty"` // Deprecated: Do not use.
 	SdkBlock *Block    `protobuf:"bytes,3,opt,name=sdk_block,json=sdkBlock,proto3" json:"sdk_block,omitempty"`
 }
 
@@ -425,6 +425,7 @@ func (m *GetBlockByHeightResponse) GetBlockId() *v1.BlockID {
 	return nil
 }
 
+// Deprecated: Do not use.
 func (m *GetBlockByHeightResponse) GetBlock() *v1.Block {
 	if m != nil {
 		return m.Block
@@ -1223,103 +1224,103 @@ func init() {
 }
 
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+	0xde, 0x5b, 0xf0, 0x7c, 0xbe, 0xd5, 0xa9, 0x8b, 0x7b, 0x23, 0x8a, 0xd7, 0x5f, 0xce, 0x6a, 0xb4,
+	0x7c, 0x1c, 0x70, 0xcb, 0x0b, 0x69, 0xc3, 0x6a, 0xb4, 0x39, 0x53, 0x7d, 0xb8, 0x3e, 0x21, 0xff,
+	0xbc, 0x16, 0xfe, 0x08, 0x00, 0x00, 0xff, 0xff, 0x46, 0x99, 0x3d, 0xbd, 0x18, 0x12, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/client/grpc/cmtservice/service.go b/client/grpc/cmtservice/service.go
index aabbee441bea..b2be81541b6e 100644
--- a/client/grpc/cmtservice/service.go
+++ b/client/grpc/cmtservice/service.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	abci "github.com/cometbft/cometbft/api/cometbft/abci/v1"
+	v1 "github.com/cometbft/cometbft/api/cometbft/types/v1"
 	gogogrpc "github.com/cosmos/gogoproto/grpc"
 	gogoprotoany "github.com/cosmos/gogoproto/types/any"
 	"github.com/grpc-ecosystem/grpc-gateway/runtime"
@@ -109,7 +110,7 @@ func (s queryServer) GetBlockByHeight(ctx context.Context, req *GetBlockByHeight
 
 	return &GetBlockByHeightResponse{
 		BlockId:  &protoBlockID,
-		Block:    protoBlock,
+		Block:    &v1.Block{}, // fill with empty block to reduce response size
 		SdkBlock: sdkBlock,
 	}, nil
 }
diff --git a/proto/cosmos/base/tendermint/v1beta1/query.proto b/proto/cosmos/base/tendermint/v1beta1/query.proto
index c5462b523678..8b90a8456f44 100644
--- a/proto/cosmos/base/tendermint/v1beta1/query.proto
+++ b/proto/cosmos/base/tendermint/v1beta1/query.proto
@@ -106,7 +106,7 @@ message GetBlockByHeightResponse {
   .cometbft.types.v1.BlockID block_id = 1;
 
   // Deprecated: please use `sdk_block` instead
-  .cometbft.types.v1.Block block = 2;
+  .cometbft.types.v1.Block block = 2 [deprecated = true];
 
   Block sdk_block = 3 [(cosmos_proto.field_added_in) = "cosmos-sdk 0.47"];
 }