diff --git a/backend/internal/handler/admin/usage_handler.go b/backend/internal/handler/admin/usage_handler.go
index a7e0156d18..ad2bbecd22 100644
--- a/backend/internal/handler/admin/usage_handler.go
+++ b/backend/internal/handler/admin/usage_handler.go
@@ -110,6 +110,7 @@ func (h *UsageHandler) List(c *gin.Context) {
 	}
 
 	model := c.Query("model")
+	requestID := strings.TrimSpace(c.Query("request_id"))
 	billingMode := strings.TrimSpace(c.Query("billing_mode"))
 
 	var requestType *int16
@@ -176,6 +177,7 @@ func (h *UsageHandler) List(c *gin.Context) {
 		APIKeyID:          apiKeyID,
 		AccountID:         accountID,
 		GroupID:           groupID,
+		RequestID:         requestID,
 		Model:             model,
 		ModelFilterSource: usagestats.ModelSourceRequested,
 		RequestType:       requestType,
diff --git a/backend/internal/handler/admin/usage_handler_request_type_test.go b/backend/internal/handler/admin/usage_handler_request_type_test.go
index bb4d43b4b2..7ea657749c 100644
--- a/backend/internal/handler/admin/usage_handler_request_type_test.go
+++ b/backend/internal/handler/admin/usage_handler_request_type_test.go
@@ -107,6 +107,18 @@ func TestAdminUsageListExactTotalTrue(t *testing.T) {
 	require.True(t, repo.listFilters.ExactTotal)
 }
 
+func TestAdminUsageListRequestIDFilter(t *testing.T) {
+	repo := &adminUsageRepoCapture{}
+	router := newAdminUsageRequestTypeTestRouter(repo)
+
+	req := httptest.NewRequest(http.MethodGet, "/admin/usage?request_id=req-0123", nil)
+	rec := httptest.NewRecorder()
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	require.Equal(t, "req-0123", repo.listFilters.RequestID)
+}
+
 func TestAdminUsageListInvalidExactTotal(t *testing.T) {
 	repo := &adminUsageRepoCapture{}
 	router := newAdminUsageRequestTypeTestRouter(repo)
diff --git a/backend/internal/pkg/usagestats/usage_log_types.go b/backend/internal/pkg/usagestats/usage_log_types.go
index 29af4d2d50..da9e748b19 100644
--- a/backend/internal/pkg/usagestats/usage_log_types.go
+++ b/backend/internal/pkg/usagestats/usage_log_types.go
@@ -270,6 +270,7 @@ type UsageLogFilters struct {
 	APIKeyID  int64
 	AccountID int64
 	GroupID   int64
+	RequestID string
 	Model     string
 	// ModelFilterSource controls how Model is matched. Empty preserves raw usage_logs.model semantics.
 	ModelFilterSource string
diff --git a/backend/internal/repository/usage_log_repo_query.go b/backend/internal/repository/usage_log_repo_query.go
index 88b7eeaf35..084b79ad97 100644
--- a/backend/internal/repository/usage_log_repo_query.go
+++ b/backend/internal/repository/usage_log_repo_query.go
@@ -116,6 +116,10 @@ func (r *usageLogRepository) ListWithFilters(ctx context.Context, params paginat
 		conditions = append(conditions, fmt.Sprintf("group_id = $%d", len(args)+1))
 		args = append(args, filters.GroupID)
 	}
+	if requestID := strings.TrimSpace(filters.RequestID); requestID != "" {
+		conditions = append(conditions, fmt.Sprintf("request_id = $%d", len(args)+1))
+		args = append(args, requestID)
+	}
 	conditions, args = appendUsageLogModelWhereCondition(conditions, args, filters.Model, filters.ModelFilterSource)
 	conditions, args = appendRequestTypeOrStreamWhereCondition(conditions, args, filters.RequestType, filters.Stream)
 	if filters.BillingType != nil {
diff --git a/backend/internal/repository/usage_log_repo_request_type_test.go b/backend/internal/repository/usage_log_repo_request_type_test.go
index aff472b0cb..9c59b38e54 100644
--- a/backend/internal/repository/usage_log_repo_request_type_test.go
+++ b/backend/internal/repository/usage_log_repo_request_type_test.go
@@ -374,6 +374,23 @@ func TestUsageLogRepositoryListWithFiltersRequestTypePriority(t *testing.T) {
 	require.NoError(t, mock.ExpectationsWereMet())
 }
 
+func TestUsageLogRepositoryListWithFiltersRequestID(t *testing.T) {
+	db, mock := newSQLMock(t)
+	repo := &usageLogRepository{sql: db}
+
+	filters := usagestats.UsageLogFilters{RequestID: " req-0123 "}
+
+	mock.ExpectQuery("SELECT .* FROM usage_logs WHERE request_id = \\$1 ORDER BY id DESC LIMIT \\$2 OFFSET \\$3").
+		WithArgs("req-0123", 21, 0).
+		WillReturnRows(sqlmock.NewRows([]string{"id"}))
+
+	logs, page, err := repo.ListWithFilters(context.Background(), pagination.PaginationParams{Page: 1, PageSize: 20}, filters)
+	require.NoError(t, err)
+	require.Empty(t, logs)
+	require.NotNil(t, page)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
 func TestUsageLogRepositoryListWithFiltersRequestedModelSource(t *testing.T) {
 	db, mock := newSQLMock(t)
 	repo := &usageLogRepository{sql: db}