diff --git a/services/repository/lfs.go b/services/repository/lfs.go
index 618cad1c995..6c0690bb512 100644
--- a/services/repository/lfs.go
+++ b/services/repository/lfs.go
@@ -14,6 +14,7 @@ import (
 	"gitea.dev/modules/git"
 	"gitea.dev/modules/lfs"
 	"gitea.dev/modules/log"
+	repo_module "gitea.dev/modules/repository"
 	"gitea.dev/modules/setting"
 	"gitea.dev/modules/timeutil"
 )
@@ -51,7 +52,10 @@ func GarbageCollectLFSMetaObjects(ctx context.Context, opts GarbageCollectLFSMet
 		if newMinimum := int64(float64(count) * opts.ProportionToCheckPerRepo); newMinimum > opts.NumberToCheckPerRepo && opts.NumberToCheckPerRepo != 0 {
 			opts.NumberToCheckPerRepo = newMinimum
 		}
-		return GarbageCollectLFSMetaObjectsForRepo(ctx, repo, opts)
+		if err := GarbageCollectLFSMetaObjectsForRepo(ctx, repo, opts); err != nil {
+			log.Error("Unable to garbage collect LFS meta objects in %-v: %v", repo, err)
+		}
+		return nil
 	})
 }
 
@@ -128,9 +132,15 @@ func GarbageCollectLFSMetaObjectsForRepo(ctx context.Context, repo *repo_model.R
 
 	if err == errStop {
 		opts.LogDetail("Processing stopped at %d total LFSMetaObjects in %-v", total, repo)
-		return nil
 	} else if err != nil {
 		return err
 	}
+
+	if collected > 0 {
+		if err := repo_module.UpdateRepoSize(ctx, repo); err != nil {
+			return fmt.Errorf("unable to update size for %s: %w", repo.FullName(), err)
+		}
+	}
+
 	return nil
 }
diff --git a/services/repository/lfs_test.go b/services/repository/lfs_test.go
index cfca83d8c25..faffa47a5b7 100644
--- a/services/repository/lfs_test.go
+++ b/services/repository/lfs_test.go
@@ -12,6 +12,7 @@ import (
 	repo_model "gitea.dev/models/repo"
 	"gitea.dev/models/unittest"
 	"gitea.dev/modules/lfs"
+	repo_module "gitea.dev/modules/repository"
 	"gitea.dev/modules/setting"
 	"gitea.dev/modules/storage"
 	"gitea.dev/modules/test"
@@ -34,6 +35,8 @@ func TestGarbageCollectLFSMetaObjects(t *testing.T) {
 	// add lfs object
 	lfsContent := []byte("gitea1")
 	lfsOid := storeObjectInRepo(t, repo.ID, &lfsContent)
+	lfsContentInRepoWithoutGitDir := []byte("gitea3")
+	storeObjectInRepo(t, 6, &lfsContentInRepoWithoutGitDir)
 
 	// gc
 	err = repo_service.GarbageCollectLFSMetaObjects(t.Context(), repo_service.GarbageCollectLFSMetaObjectsOptions{
@@ -62,6 +65,8 @@ func TestGarbageCollectLFSMetaObjectsForRepoAutoFix(t *testing.T) {
 	lfsContent := []byte("gitea2")
 	lfsOid := storeObjectInRepo(t, repo.ID, &lfsContent)
 
+	assert.NoError(t, repo_module.UpdateRepoSize(t.Context(), repo))
+
 	err = repo_service.GarbageCollectLFSMetaObjectsForRepo(t.Context(), repo, repo_service.GarbageCollectLFSMetaObjectsOptions{
 		LogDetail:               func(string, ...any) {},
 		AutoFix:                 true,
@@ -72,6 +77,10 @@ func TestGarbageCollectLFSMetaObjectsForRepoAutoFix(t *testing.T) {
 
 	_, err = git_model.GetLFSMetaObjectByOid(t.Context(), repo.ID, lfsOid)
 	assert.ErrorIs(t, err, git_model.ErrLFSObjectNotExist)
+
+	// LFSSize is recalculated to reflect the removed orphaned object
+	repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
+	assert.EqualValues(t, 0, repo.LFSSize)
 }
 
 func storeObjectInRepo(t *testing.T, repositoryID int64, content *[]byte) string {