diff --git a/.github/workflows/win.yml b/.github/workflows/win.yml
new file mode 100644
index 00000000000..cfdf171f44a
--- /dev/null
+++ b/.github/workflows/win.yml
@@ -0,0 +1,101 @@
+name: WindowsRelease
+
+on:
+   push:
+    branches: [ master, rel-* ]
+   pull_request:
+    branches: [ master, rel-* ]
+
+
+jobs:
+  build:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        python-version: [3.6]
+        architecture: ['x64', 'x86']
+    steps:         
+    - name: Checkout Protobuf 
+      uses: actions/checkout@master
+      with:
+        repository: protocolbuffers/protobuf
+        ref: refs/tags/v3.11.3
+        path: ./protobuf_root/protobuf
+        
+    - name: Checkout Protobuf submodules
+      shell: bash
+      run: |
+         cd ./protobuf_root/protobuf
+         auth_header="$(git config --local --get http.https://github.com/.extraheader)"
+         git submodule sync --recursive
+         git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
+        
+    - name: Checkout ONNX
+      uses: actions/checkout@v2
+      with:
+         path: ./onnx
+         
+    - name: Checkout ONNX submodules
+      shell: bash
+      run: |
+         cd onnx
+         auth_header="$(git config --local --get http.https://github.com/.extraheader)"
+         git submodule sync --recursive
+         git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
+        
+    - name: Add msbuild to PATH
+      uses: microsoft/setup-msbuild@v1.0.2
+            
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+        architecture: ${{ matrix.architecture }}    
+          
+    - name: Install python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        # pytest 6.0 made deprecation warnings fail by default, pinning pytest to 5.4.3.
+        # TODO replace deprecated function with the suggested one. https://docs.pytest.org/en/stable/deprecations.html#id5
+        pip install pytest==5.4.3 nbval numpy wheel          
+            
+    - name: Build ONNX wheel
+      run: |        
+        $arch = 'x64'
+        if ('${{ matrix.architecture }}' -eq 'x86') {
+          $arch = 'Win32'
+        }
+        echo "Install protobuf"
+        cd ./protobuf_root
+        $protobuf_root_dir = Get-Location
+        mkdir protobuf_install
+        cd ./protobuf/cmake
+        dir
+        
+        cmake -G "Visual Studio 16 2019" -A $arch -DCMAKE_INSTALL_PREFIX="../../protobuf_install" -DCMAKE_BUILD_TYPE=Release -Dprotobuf_MSVC_STATIC_RUNTIME=ON -DProtobuf_USE_STATIC_LIBS=ON -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_BUILD_EXAMPLES=OFF .
+        msbuild protobuf.sln /m /p:Configuration=Release
+        msbuild INSTALL.vcxproj /p:Configuration=Release
+        echo "Protobuf installation complete."
+        
+        echo "Set paths"        
+        $protoc_path = Join-Path -Path $protobuf_root_dir -ChildPath "protobuf_install\bin"
+        $protoc_lib_path = Join-Path -Path $protobuf_root_dir -ChildPath "protobuf_install\lib"
+        $protobuf_include_path = Join-Path -Path $protobuf_root_dir -ChildPath "protobuf_install\include"
+        $Env:PATH="$ENV:PATH;$protoc_path;$protoc_lib_path;$protobuf_include_path"
+        $($Env:PATH).Split(';')
+        protoc
+        
+        cd ../../../onnx
+        dir
+        echo "Install ONNX"
+        $Env:USE_MSVC_STATIC_RUNTIME=1
+        $Env:ONNX_ML=1
+        $Env:CMAKE_ARGS="-DONNX_USE_PROTOBUF_SHARED_LIBS=OFF -DProtobuf_USE_STATIC_LIBS=ON -DONNX_USE_LITE_PROTO=ON"
+        python setup.py bdist_wheel
+        Get-ChildItem -Path dist/*.whl | foreach {pip install --upgrade $_.fullname}
+        pytest
+        
+    - uses: actions/upload-artifact@v1
+      with:
+        name: wheels
+        path: ./onnx/dist