diff --git a/tsdb/block.go b/tsdb/block.go
index 7d243f8bf7..8d7badef9e 100644
--- a/tsdb/block.go
+++ b/tsdb/block.go
@@ -188,10 +188,11 @@ type BlockMeta struct {
 
 // BlockStats contains stats about contents of a block.
 type BlockStats struct {
-	NumSamples    uint64 `json:"numSamples,omitempty"`
-	NumSeries     uint64 `json:"numSeries,omitempty"`
-	NumChunks     uint64 `json:"numChunks,omitempty"`
-	NumTombstones uint64 `json:"numTombstones,omitempty"`
+	NumSamples          uint64 `json:"numSamples,omitempty"`
+	NumHistogramSamples uint64 `json:"numHistogramSamples,omitempty"`
+	NumSeries           uint64 `json:"numSeries,omitempty"`
+	NumChunks           uint64 `json:"numChunks,omitempty"`
+	NumTombstones       uint64 `json:"numTombstones,omitempty"`
 }
 
 // BlockDesc describes a block by ULID and time range.
diff --git a/tsdb/compact.go b/tsdb/compact.go
index 602958eaeb..c3d3770bff 100644
--- a/tsdb/compact.go
+++ b/tsdb/compact.go
@@ -896,6 +896,10 @@ func (c DefaultBlockPopulator) PopulateBlock(ctx context.Context, metrics *Compa
 		meta.Stats.NumSeries++
 		for _, chk := range chks {
 			meta.Stats.NumSamples += uint64(chk.Chunk.NumSamples())
+			enc := chk.Chunk.Encoding()
+			if enc == chunkenc.EncHistogram || enc == chunkenc.EncFloatHistogram {
+				meta.Stats.NumHistogramSamples += uint64(chk.Chunk.NumSamples())
+			}
 		}
 
 		for _, chk := range chks {
diff --git a/tsdb/compact_test.go b/tsdb/compact_test.go
index 655cfa408b..4f376c2c1a 100644
--- a/tsdb/compact_test.go
+++ b/tsdb/compact_test.go
@@ -1098,6 +1098,11 @@ func TestCompaction_populateBlock(t *testing.T) {
 				s.NumChunks += uint64(len(series.chunks))
 				for _, chk := range series.chunks {
 					s.NumSamples += uint64(len(chk))
+					for _, smpl := range chk {
+						if smpl.h != nil || smpl.fh != nil {
+							s.NumHistogramSamples++
+						}
+					}
 				}
 			}
 			require.Equal(t, s, meta.Stats)