diff --git a/swift/ql/src/change-notes/2025-03-18-number_of_nodes.md b/swift/ql/src/change-notes/2025-03-18-number_of_nodes.md
new file mode 100644
index 000000000000..bf7a08198221
--- /dev/null
+++ b/swift/ql/src/change-notes/2025-03-18-number_of_nodes.md
@@ -0,0 +1,4 @@
+---
+category: newQuery
+---
+* Added a new summary query counting the total number of extracted AST nodes.
diff --git a/swift/ql/src/diagnostics/internal/AstNodes.ql b/swift/ql/src/diagnostics/internal/AstNodes.ql
new file mode 100644
index 000000000000..e534346a0790
--- /dev/null
+++ b/swift/ql/src/diagnostics/internal/AstNodes.ql
@@ -0,0 +1,11 @@
+/**
+ * @name Number of extracted AST nodes
+ * @description Count all AST nodes.
+ * @kind metric
+ * @id swift/diagnostics/ast-nodes
+ * @tags summary
+ */
+
+import swift
+
+select count(AstNode n)