diff --git a/mlir/lib/Bindings/Python/CMakeLists.txt b/mlir/lib/Bindings/Python/CMakeLists.txt
--- a/mlir/lib/Bindings/Python/CMakeLists.txt
+++ b/mlir/lib/Bindings/Python/CMakeLists.txt
@@ -71,4 +71,23 @@
     COMPONENT MLIRBindingsPythonSources)
 endif()
 
+# Dialect sources are generated. Install separately.
+# Note that __pycache__ directories may have been left by tests and other
+# executions. And __init__.py is handled as a regular source file.
+install(
+  DIRECTORY ${PROJECT_BINARY_DIR}/python/mlir/dialects
+  DESTINATION python/mlir
+  COMPONENT MLIRBindingsPythonDialects
+  FILES_MATCHING PATTERN "*.py"
+  PATTERN "__pycache__" EXCLUDE
+  PATTERN "__init__.py" EXCLUDE
+)
+
+if (NOT LLVM_ENABLE_IDE)
+  add_llvm_install_targets(
+    install-MLIRBindingsPythonDialects
+    DEPENDS MLIRBindingsPythonSources
+    COMPONENT MLIRBindingsPythonDialects)
+endif()
+
 add_subdirectory(Transforms)