diff --git a/ports/onnx-optimizer/fix-cmakelists.patch b/ports/onnx-optimizer/fix-cmakelists.patch
new file mode 100644
index 00000000..860cd1de
--- /dev/null
+++ b/ports/onnx-optimizer/fix-cmakelists.patch
@@ -0,0 +1,36 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0063385..e9ad9ff 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -12,6 +12,13 @@ set(CMAKE_CXX_STANDARD 17)
+ 
+ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+ 
++function(add_msvc_runtime_flag lib)
++  if(${ONNX_USE_MSVC_STATIC_RUNTIME})
++    target_compile_options(${lib} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/MT> $<$<CONFIG:Debug>:/MTd>)    
++  else()
++    target_compile_options(${lib} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/MD> $<$<CONFIG:Debug>:/MDd>)
++  endif()
++endfunction()
+ include(cmake/utils.cmake)
+ 
+ # For integration with onnxruntime_webassembly etc.
+@@ -26,7 +33,7 @@ if(NOT ONNX_OPT_USE_SYSTEM_PROTOBUF)
+   add_subdirectory_if_no_target(${PROJECT_SOURCE_DIR}/third_party/protobuf/cmake libprotobuf)
+ endif()
+ 
+-
++find_package(ONNX CONFIG REQUIRED) # ONNX::onnx
+ set(ONNX_ROOT ${PROJECT_SOURCE_DIR}/third_party/onnx)
+ add_subdirectory_if_no_target(${ONNX_ROOT} ${ONNX_TARGET_NAME})
+ 
+diff --git a/cmake/utils.cmake b/cmake/utils.cmake
+index 6cca9f3..a735434 100644
+--- a/cmake/utils.cmake
++++ b/cmake/utils.cmake
+@@ -1,4 +1,3 @@
+-include(${PROJECT_SOURCE_DIR}/third_party/onnx/cmake/Utils.cmake)
+ 
+ # Poor man's FetchContent
+ function(add_subdirectory_if_no_target dir target)
diff --git a/ports/onnx-optimizer/portfile.cmake b/ports/onnx-optimizer/portfile.cmake
new file mode 100644
index 00000000..100cf851
--- /dev/null
+++ b/ports/onnx-optimizer/portfile.cmake
@@ -0,0 +1,32 @@
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO onnx/optimizer
+    REF "v${VERSION}"
+    SHA512 552d6fa261c3ce2db2e0938a5b5261676335bce9bd828b46a1e2631f3b362c748ae9a6cfe7d62072fc3774b3f506bc54aa5827b52241e6f48d78a08dea1d9316
+    HEAD_REF master
+    PATCHES
+        fix-cmakelists.patch
+)
+
+string(COMPARE EQUAL "${VCPKG_CRT_LINKAGE}" "static" USE_STATIC_RUNTIME)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        -DONNX_USE_MSVC_STATIC_RUNTIME=${USE_STATIC_RUNTIME}
+        -DONNX_OPT_USE_SYSTEM_PROTOBUF=ON
+        -DONNX_TARGET_NAME=ONNX::onnx
+        -DBUILD_ONNX_PYTHON=OFF
+)
+vcpkg_cmake_install()
+vcpkg_copy_pdbs()
+vcpkg_cmake_config_fixup(PACKAGE_NAME ONNXOptimizer CONFIG_PATH lib/cmake/ONNXOptimizer)
+
+file(REMOVE_RECURSE
+    "${CURRENT_PACKAGES_DIR}/debug/include"
+    "${CURRENT_PACKAGES_DIR}/debug/share"
+    "${CURRENT_PACKAGES_DIR}/include/onnxoptimizer/test"
+)
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")
diff --git a/ports/onnx-optimizer/vcpkg.json b/ports/onnx-optimizer/vcpkg.json
new file mode 100644
index 00000000..bb3c674d
--- /dev/null
+++ b/ports/onnx-optimizer/vcpkg.json
@@ -0,0 +1,18 @@
+{
+  "name": "onnx-optimizer",
+  "version-semver": "0.3.19",
+  "description": "Actively maintained ONNX Optimizer",
+  "homepage": "https://github.com/onnx/optimizer",
+  "license": "Apache-2.0",
+  "dependencies": [
+    "onnx",
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ]
+}