diff --git a/ports/onnx/fix-cmakelists.patch b/ports/onnx/fix-cmakelists.patch
index 2f5e79c95a..984e098431 100644
--- a/ports/onnx/fix-cmakelists.patch
+++ b/ports/onnx/fix-cmakelists.patch
@@ -1,31 +1,15 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index b666eec..66c234d 100644
+index 8b5af30..6836651 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -63,6 +63,16 @@ endif()
+@@ -668,6 +668,10 @@ install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx
+         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+         FILES_MATCHING
+         PATTERN "*.h")
++install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
++        FILES_MATCHING PATTERN "*.proto")
++install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
++        FILES_MATCHING PATTERN "*.proto3")
  
- include(GNUInstallDirs)
- 
-+# install protobuf files
-+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-data.proto
-+              ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-data.proto3
-+              ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-ml.proto
-+              ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-ml.proto3
-+              ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-operators-ml.proto
-+              ${CMAKE_CURRENT_BINARY_DIR}/onnx/onnx-operators-ml.proto3
-+        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/onnx
-+)
-+
- set(ONNX_ROOT ${PROJECT_SOURCE_DIR})
- 
- # Read ONNX version
-@@ -104,7 +114,8 @@ endif()
- # find_package Python has replaced PythonInterp and PythonLibs since cmake 3.12
- # Use the following command in the future; now this is only compatible with the latest pybind11
- # find_package(Python ${PY_VERSION} COMPONENTS Interpreter Development REQUIRED)
--find_package(PythonInterp ${PY_VERSION} REQUIRED)
-+find_package(Python3 ${PY_VERSION} COMPONENTS Interpreter REQUIRED)
-+set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
- if(BUILD_ONNX_PYTHON)
-   find_package(PythonLibs ${PY_VERSION})
- endif()
+ configure_file(
+   ${PROJECT_SOURCE_DIR}/cmake/ONNXConfigVersion.cmake.in
diff --git a/ports/onnx/fix-cxx_standard.patch b/ports/onnx/fix-cxx_standard.patch
deleted file mode 100644
index 4f9f106260..0000000000
--- a/ports/onnx/fix-cxx_standard.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 55869f4..e8b20cb 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -524,6 +524,7 @@ else()
-   set_target_properties(onnx_proto PROPERTIES VISIBILITY_INLINES_HIDDEN 1)
- endif()
- target_compile_definitions(onnx_proto PRIVATE ${ONNX_API_DEFINE})
-+target_compile_features(onnx_proto PUBLIC cxx_std_${CMAKE_CXX_STANDARD})
- 
- if(ONNX_USE_LITE_PROTO)
-   if(TARGET protobuf::libprotobuf-lite)
diff --git a/ports/onnx/fix-dependency-protobuf.patch b/ports/onnx/fix-dependency-protobuf.patch
deleted file mode 100644
index 28960b4cb1..0000000000
--- a/ports/onnx/fix-dependency-protobuf.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index d81ac1d..9f97998 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -149,6 +149,7 @@ if(ONNX_BUILD_TESTS)
-   set(googletest_STATIC_LIBRARIES GTest::gtest)
- endif()
- 
-+find_package(Protobuf CONFIG REQUIRED)
- if((ONNX_USE_LITE_PROTO AND TARGET protobuf::libprotobuf-lite) OR ((NOT ONNX_USE_LITE_PROTO) AND TARGET protobuf::libprotobuf))
-   # Sometimes we need to use protoc compiled for host architecture while linking
-   # libprotobuf against target architecture. See https://github.com/caffe2/caffe
-diff --git a/cmake/ONNXConfig.cmake.in b/cmake/ONNXConfig.cmake.in
-index d588f8a..dbd4398 100644
---- a/cmake/ONNXConfig.cmake.in
-+++ b/cmake/ONNXConfig.cmake.in
-@@ -6,9 +6,8 @@
- # library version information
- set(ONNX_VERSION "@ONNX_VERSION@")
- 
--list(APPEND CMAKE_PREFIX_PATH "@PROTOBUF_DIR@")
--set(Protobuf_INCLUDE_DIR "@PROTOBUF_INCLUDE_DIR@")
--find_package(Protobuf REQUIRED)
-+include(CMakeFindDependencyMacro)
-+find_dependency(Protobuf CONFIG)
- 
- # import targets
- include ("${CMAKE_CURRENT_LIST_DIR}/ONNXTargets.cmake")
diff --git a/ports/onnx/fix-pr-7390.patch b/ports/onnx/fix-pr-7390.patch
new file mode 100644
index 0000000000..c9477059e4
--- /dev/null
+++ b/ports/onnx/fix-pr-7390.patch
@@ -0,0 +1,30 @@
+diff --git a/onnx/defs/schema.h b/onnx/defs/schema.h
+index acf3aac..adae2d5 100644
+--- a/onnx/defs/schema.h
++++ b/onnx/defs/schema.h
+@@ -979,8 +979,10 @@ class OpSchemaRegistry final : public ISchemaRegistry {
+ 
+   class OpSchemaRegisterOnce final {
+    public:
+-    // Export to cpp custom register macro
+-    explicit OpSchemaRegisterOnce(
++    // Export to cpp custom register macro.
++    // DO NOT decorate the constructor as "explicit" because that breaks the macro ONNX_OPERATOR_SCHEMA_UNIQ.
++    // NOLINTNEXTLINE(google-explicit-constructor)
++    OpSchemaRegisterOnce( // NOSONAR
+         OpSchema op_schema,
+         int opset_version_to_load = 0,
+         bool fail_duplicate_schema = true) {
+@@ -1311,9 +1313,9 @@ size_t ReplaceAll(std::string& s, const char* from, const char* to);
+ // Legacy macros to register schema at static initialization
+ #define ONNX_OPERATOR_SCHEMA(name) ONNX_OPERATOR_SCHEMA_UNIQ_HELPER(__COUNTER__, name)
+ #define ONNX_OPERATOR_SCHEMA_UNIQ_HELPER(Counter, name) ONNX_OPERATOR_SCHEMA_UNIQ(Counter, name)
+-#define ONNX_OPERATOR_SCHEMA_UNIQ(Counter, name)                                                                      \
+-  static ONNX_NAMESPACE::OpSchemaRegistry::OpSchemaRegisterOnce(op_schema_register_once##name##Counter) ONNX_UNUSED = \
+-      OpSchema(#name, __FILE__, __LINE__)
++#define ONNX_OPERATOR_SCHEMA_UNIQ(Counter, name)                                                                     \
++  static ONNX_NAMESPACE::OpSchemaRegistry::OpSchemaRegisterOnce op_schema_register_once##name##Counter ONNX_UNUSED = \
++      ONNX_NAMESPACE::OpSchema(#name, __FILE__, __LINE__)
+ 
+ // Helper function
+ size_t ReplaceAll(std::string& s, const char* from, const char* to);
diff --git a/ports/onnx/portfile.cmake b/ports/onnx/portfile.cmake
index f741ca064c..9a34e56ded 100644
--- a/ports/onnx/portfile.cmake
+++ b/ports/onnx/portfile.cmake
@@ -4,16 +4,14 @@ vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO onnx/onnx
     REF "v${VERSION}"
-    SHA512 5a18e2b19ec9c18c8b115fb7e12ed98eddaa581c95f15c4dd420cd6c86e7caa04f9a393da589e76b89cf9b3544abd3749a8c77c2446782f37502eb74e9b1f661
+    SHA512 e6f7b5782a43a91783607549e4d0f0a9cbd46dfb67a602f81aaffc7bcdd8f450fe9c225f0bc314704f2923e396f0df5b03ea91af4a7887203c0b8372bc2749d0
     PATCHES
         fix-cmakelists.patch
-        fix-dependency-protobuf.patch
-        fix-cxx_standard.patch
+        fix-pr-7390.patch # part of https://github.com/onnx/onnx PR 7390
 )
 
 string(COMPARE EQUAL "${VCPKG_CRT_LINKAGE}" "static" USE_STATIC_RUNTIME)
 
-# ONNX_CUSTOM_PROTOC_EXECUTABLE
 find_program(PROTOC NAMES protoc PATHS "${CURRENT_HOST_INSTALLED_DIR}/tools/protobuf" REQUIRED NO_DEFAULT_PATH NO_CMAKE_PATH)
 
 # ONNX_USE_PROTOBUF_SHARED_LIBS: find the library and check its file extension
@@ -31,17 +29,19 @@ vcpkg_cmake_configure(
     SOURCE_PATH "${SOURCE_PATH}"
     OPTIONS
         ${FEATURE_OPTIONS}
+        "-DPython_EXECUTABLE:FILEPATH=${PYTHON3}"
         "-DPython3_EXECUTABLE:FILEPATH=${PYTHON3}"
-        "-DONNX_CUSTOM_PROTOC_EXECUTABLE:FILEPATH=${PROTOC}"
         "-DProtobuf_PROTOC_EXECUTABLE:FILEPATH=${PROTOC}"
         -DONNX_ML=ON
         -DONNX_USE_PROTOBUF_SHARED_LIBS=${USE_PROTOBUF_SHARED}
         -DONNX_USE_LITE_PROTO=OFF
         -DONNX_USE_MSVC_STATIC_RUNTIME=${USE_STATIC_RUNTIME}
         -DONNX_BUILD_TESTS=OFF
-        -DONNX_BUILD_BENCHMARKS=OFF
+        -DONNX_BUILD_CUSTOM_PROTOBUF=OFF
     MAYBE_UNUSED_VARIABLES
         ONNX_USE_MSVC_STATIC_RUNTIME
+        Python_EXECUTABLE
+        Python3_EXECUTABLE
 )
 vcpkg_cmake_install()
 vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/ONNX PACKAGE_NAME ONNX)
diff --git a/ports/onnx/vcpkg.json b/ports/onnx/vcpkg.json
index c4e43a7700..8fecf50e6d 100644
--- a/ports/onnx/vcpkg.json
+++ b/ports/onnx/vcpkg.json
@@ -1,7 +1,6 @@
 {
   "name": "onnx",
-  "version-semver": "1.17.0",
-  "port-version": 2,
+  "version-semver": "1.19.0",
   "description": "Open standard for machine learning interoperability",
   "homepage": "https://onnx.ai",
   "license": "Apache-2.0",
diff --git a/versions/baseline.json b/versions/baseline.json
index dc7ab3adb8..7696ac305f 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7097,8 +7097,8 @@
       "port-version": 0
     },
     "onnx": {
-      "baseline": "1.17.0",
-      "port-version": 2
+      "baseline": "1.19.0",
+      "port-version": 0
     },
     "onnx-optimizer": {
       "baseline": "0.3.19",
diff --git a/versions/o-/onnx.json b/versions/o-/onnx.json
index 6f98f5a5d8..51c676203b 100644
--- a/versions/o-/onnx.json
+++ b/versions/o-/onnx.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "84490e57e9b50a233ec36469c49f064cb3f90822",
+      "version-semver": "1.19.0",
+      "port-version": 0
+    },
     {
       "git-tree": "5db9b37d64932bc2c245c5ce52daded31de03a9e",
       "version-semver": "1.17.0",