diff --git a/.github/workflows/amd64_linux_bazel.yml b/.github/workflows/amd64_linux_bazel.yml
index 69625b4d1c..b9713a8c7d 100644
--- a/.github/workflows/amd64_linux_bazel.yml
+++ b/.github/workflows/amd64_linux_bazel.yml
@@ -12,6 +12,7 @@ jobs:
           {version: '3.10'},
           {version: '3.11'},
           {version: '3.12'},
+          {version: '3.13'},
         ]
       fail-fast: false
     name: Linux • Bazel • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/amd64_linux_cmake_python.yml b/.github/workflows/amd64_linux_cmake_python.yml
index 68ac73ad65..20c6d90fea 100644
--- a/.github/workflows/amd64_linux_cmake_python.yml
+++ b/.github/workflows/amd64_linux_cmake_python.yml
@@ -18,6 +18,7 @@ jobs:
           {version: "3.10"},
           {version: "3.11"},
           {version: "3.12"},
+          {version: "3.13"},
         ]
       fail-fast: false
     name: Linux • ${{ matrix.cmake.generator }} • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/amd64_macos_bazel.yml b/.github/workflows/amd64_macos_bazel.yml
index 2f5990146d..41e20f9f00 100644
--- a/.github/workflows/amd64_macos_bazel.yml
+++ b/.github/workflows/amd64_macos_bazel.yml
@@ -12,6 +12,7 @@ jobs:
           {version: '3.10'},
           {version: '3.11'},
           {version: '3.12'},
+          {version: '3.13'},
         ]
       fail-fast: false
     name: MacOS • Bazel • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/amd64_macos_cmake_python.yml b/.github/workflows/amd64_macos_cmake_python.yml
index b1729db0c9..072d573c71 100644
--- a/.github/workflows/amd64_macos_cmake_python.yml
+++ b/.github/workflows/amd64_macos_cmake_python.yml
@@ -16,7 +16,8 @@ jobs:
           {version: "3.9"},
           {version: "3.10"},
           {version: "3.11"},
-          {version: "3.12"}
+          {version: "3.12"},
+          {version: "3.13"},
         ]
       fail-fast: false
     name: MacOS • ${{ matrix.cmake.generator }} • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/amd64_windows_bazel.yml b/.github/workflows/amd64_windows_bazel.yml
index 30c9245878..f891de2aac 100644
--- a/.github/workflows/amd64_windows_bazel.yml
+++ b/.github/workflows/amd64_windows_bazel.yml
@@ -13,6 +13,7 @@ jobs:
           {version: '3.10'},
           {version: '3.11'},
           {version: '3.12'},
+          {version: '3.13'},
         ]
       fail-fast: false # Don't cancel all jobs if one fails.
     name: ${{ matrix.runner }} • Bazel • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/amd64_windows_cmake_python.yml b/.github/workflows/amd64_windows_cmake_python.yml
index a8d0babfd6..7cc795f5c3 100644
--- a/.github/workflows/amd64_windows_cmake_python.yml
+++ b/.github/workflows/amd64_windows_cmake_python.yml
@@ -16,6 +16,7 @@ jobs:
           {version: "3.10", dir: Python310},
           {version: "3.11", dir: Python311},
           {version: "3.12", dir: Python312},
+          {version: "3.13", dir: Python313},
         ]
       fail-fast: false
     name: Windows • ${{ matrix.cmake.generator }} • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/arm64_macos_bazel.yml b/.github/workflows/arm64_macos_bazel.yml
index f76442597d..8ac4f1d071 100644
--- a/.github/workflows/arm64_macos_bazel.yml
+++ b/.github/workflows/arm64_macos_bazel.yml
@@ -12,6 +12,7 @@ jobs:
           {version: '3.10'},
           {version: '3.11'},
           {version: '3.12'},
+          {version: '3.13'},
         ]
       fail-fast: false
     name: MacOS • Bazel • Python-${{ matrix.python.version }}
diff --git a/.github/workflows/arm64_macos_cmake_python.yml b/.github/workflows/arm64_macos_cmake_python.yml
index 7cd90596f4..5de445d2fe 100644
--- a/.github/workflows/arm64_macos_cmake_python.yml
+++ b/.github/workflows/arm64_macos_cmake_python.yml
@@ -16,7 +16,8 @@ jobs:
           {version: "3.9"},
           {version: "3.10"},
           {version: "3.11"},
-          {version: "3.12"}
+          {version: "3.12"},
+          {version: "3.13"},
         ]
       fail-fast: false
     name: MacOS • ${{ matrix.cmake.generator }} • Python-${{ matrix.python.version }}
diff --git a/ortools/python/setup.py.in b/ortools/python/setup.py.in
index 2ffbce0675..c01f935895 100644
--- a/ortools/python/setup.py.in
+++ b/ortools/python/setup.py.in
@@ -162,6 +162,7 @@ setup(
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
         'Programming Language :: C++',
         'Programming Language :: Python :: Implementation :: CPython',
         'Topic :: Office/Business :: Scheduling',
diff --git a/tools/docker/Makefile b/tools/docker/Makefile
index 220912fa68..2fef1ffe61 100644
--- a/tools/docker/Makefile
+++ b/tools/docker/Makefile
@@ -59,6 +59,7 @@ help:
 	@echo -e "\t\t${BOLD}310${RESET} Python3.10"
 	@echo -e "\t\t${BOLD}311${RESET} Python3.11"
 	@echo -e "\t\t${BOLD}312${RESET} Python3.12"
+	@echo -e "\t\t${BOLD}313${RESET} Python3.13"
 	@echo
 	@echo -e "\t${BOLD}<step>${RESET}:"
 	@echo -e "\t\t${BOLD}env${RESET}"
diff --git a/tools/release/build_delivery_macos.sh b/tools/release/build_delivery_macos.sh
index aa5cbfc3ab..f5bc67ada2 100755
--- a/tools/release/build_delivery_macos.sh
+++ b/tools/release/build_delivery_macos.sh
@@ -213,9 +213,9 @@ function build_python() {
   command -v swig | xargs echo "swig: " | tee -a build.log
 
   if [[ ${PLATFORM} == "arm64" ]]; then
-    local -r PY=(3.8 3.9 3.10 3.11 3.12)
+    local -r PY=(3.8 3.9 3.10 3.11 3.12 3.13)
   else
-    local -r PY=(3.8 3.9 3.10 3.11 3.12)
+    local -r PY=(3.8 3.9 3.10 3.11 3.12 3.13)
   fi
 
   # Check Python env
diff --git a/tools/release/build_delivery_win.cmd b/tools/release/build_delivery_win.cmd
index 13e45fe408..4dfdc18c3b 100644
--- a/tools/release/build_delivery_win.cmd
+++ b/tools/release/build_delivery_win.cmd
@@ -269,7 +269,7 @@ set PATH=%userprofile%\AppData\Roaming\Python\Python3%1\Scripts;%PATH%
 ::echo "python path: %PATH%"
 GOTO :eof
 
-REM PYTHON 3.8, 3.9, 3.10, 3.11, 3.12
+REM PYTHON 3.8, 3.9, 3.10, 3.11, 3.12, 3,13
 :BUILD_PYTHON
 title Build Python
 set HASH=
@@ -279,7 +279,7 @@ echo Python build seems up to date, skipping
 exit /B 0
 )
 
-FOR %%v IN (8 9 10 11 12) DO (
+FOR %%v IN (8 9 10 11 12 13) DO (
   title Build Python 3.%%v
   echo Check python3.%%v... | tee.exe -a build.log
   which.exe "C:\python3%%v-64\python.exe" || exit 1
diff --git a/tools/release/test_delivery_macos.sh b/tools/release/test_delivery_macos.sh
index b2c50e3e7f..6704dd0e9c 100755
--- a/tools/release/test_delivery_macos.sh
+++ b/tools/release/test_delivery_macos.sh
@@ -23,9 +23,9 @@ command -v make | xargs echo "make: " | tee -a test.log
 command -v swig | xargs echo "swig: " | tee -a test.log
 # python
 if [[ ${PLATFORM} == "arm64" ]]; then
-  local -r PY=(3.8 3.9 3.10 3.11 3.12)
+  local -r PY=(3.8 3.9 3.10 3.11 3.12 3.13)
 else
-  local -r PY=(3.8 3.9 3.10 3.11 3.12)
+  local -r PY=(3.8 3.9 3.10 3.11 3.12 3.13)
 fi
 
 for i in "${PY[@]}"; do
diff --git a/tools/release/test_delivery_win.cmd b/tools/release/test_delivery_win.cmd
index 0e3fd13ab1..71d98191ae 100755
--- a/tools/release/test_delivery_win.cmd
+++ b/tools/release/test_delivery_win.cmd
@@ -186,3 +186,36 @@ echo Testing ortools Python3.12... | tee.exe -a test.log
 echo Testing ortools Python3.12...DONE | tee.exe -a test.log
 
 FOR %%i IN (%TEMP_DIR%\ortools\dist\*.whl) DO copy %%i .
+
+REM ###################
+REM ##  PYTHON 3.13  ##
+REM ###################
+echo Cleaning Python... | tee.exe -a test.log
+make.exe clean_python WINDOWS_PATH_TO_PYTHON=c:\python313-64
+echo Cleaning Python...DONE | tee.exe -a test.log
+
+REM make.exe python WINDOWS_PATH_TO_PYTHON=c:\python313-64 || exit 1
+REM echo make python3.13: DONE | tee.exe -a build.log
+REM make.exe test_python WINDOWS_PATH_TO_PYTHON=c:\python313-64 || exit 1
+REM echo make test_python3.13: DONE | tee.exe -a build.log
+echo Rebuild Python3.13 pypi archive... | tee.exe -a test.log
+make.exe package_python WINDOWS_PATH_TO_PYTHON=c:\python313-64 || exit 1
+echo Rebuild Python3.13 pypi archive...DONE | tee.exe -a test.log
+
+echo Creating Python3.13 venv... | tee.exe -a test.log
+set PATH=c:\python313-64;c:\python313-64\Scripts;%PATH%
+python -m pip install virtualenv
+set TEMP_DIR=temp_python313
+python -m virtualenv %TEMP_DIR%\venv
+set PATH=%LOCAL_PATH%
+echo Creating Python3.13 venv...DONE | tee.exe -a test.log
+
+echo Installing ortools Python3.13 venv... | tee.exe -a test.log
+FOR %%i IN (%TEMP_DIR%\ortools\dist\*.whl) DO %TEMP_DIR%\venv\Scripts\python -m pip install %%i
+echo Installing ortools Python3.13 venv...DONE | tee.exe -a test.log
+
+echo Testing ortools Python3.13... | tee.exe -a test.log
+%TEMP_DIR%\venv\Scripts\python cmake\samples\python\sample.py 2>&1 | tee.exe -a test.log
+echo Testing ortools Python3.13...DONE | tee.exe -a test.log
+
+FOR %%i IN (%TEMP_DIR%\ortools\dist\*.whl) DO copy %%i .