diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index cdec3e9b..a19b27a7 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -16,13 +16,16 @@ branchProtectionRules:
     - 'unit_grpc_gcp-3.9'
     - 'unit_grpc_gcp-3.10'
     - 'unit_grpc_gcp-3.11'
+    - 'unit_grpc_gcp-3.12'
     - 'unit-3.7'
     - 'unit-3.8'
     - 'unit-3.9'
     - 'unit-3.10'
     - 'unit-3.11'
+    - 'unit-3.12'
     - 'unit_wo_grpc-3.10'
     - 'unit_wo_grpc-3.11'
+    - 'unit_wo_grpc-3.12'
     - 'cover'
     - 'docs'
     - 'docfx'
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 0d7789b6..497492af 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -18,6 +18,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
         exclude:
           - option: "_wo_grpc"
             python: 3.7
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 13d7a516..8d1475ce 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -21,7 +21,7 @@ In order to add a feature:
   documentation.
 
 - The feature must work fully on the following CPython versions:
-  3.7, 3.8, 3.9, 3.10, and 3.11 on both UNIX and Windows.
+  3.7, 3.8, 3.9, 3.10, 3.11 and 3.12 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
   "unnecessary" is of course subjective, but new dependencies should
@@ -71,7 +71,7 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 
 - To run a single unit test::
 
-    $ nox -s unit-3.11 -- -k <name of test>
+    $ nox -s unit-3.12 -- -k <name of test>
 
 
   .. note::
@@ -202,12 +202,14 @@ We support:
 -  `Python 3.9`_
 -  `Python 3.10`_
 -  `Python 3.11`_
+-  `Python 3.12`_
 
 .. _Python 3.7: https://docs.python.org/3.7/
 .. _Python 3.8: https://docs.python.org/3.8/
 .. _Python 3.9: https://docs.python.org/3.9/
 .. _Python 3.10: https://docs.python.org/3.10/
 .. _Python 3.11: https://docs.python.org/3.11/
+.. _Python 3.12: https://docs.python.org/3.12/
 
 
 Supported versions can be found in our ``noxfile.py`` `config`_.
diff --git a/noxfile.py b/noxfile.py
index d0ce6d6c..2b668e7b 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -149,7 +149,7 @@ def unit(session):
     default(session)
 
 
-@nox.session(python=["3.7", "3.8", "3.9", "3.10", "3.11"])
+@nox.session(python=["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"])
 def unit_grpc_gcp(session):
     """Run the unit test suite with grpcio-gcp installed."""
     constraints_path = str(
@@ -163,7 +163,7 @@ def unit_grpc_gcp(session):
     default(session)
 
 
-@nox.session(python=["3.8", "3.10", "3.11"])
+@nox.session(python=["3.8", "3.10", "3.11", "3.12"])
 def unit_wo_grpc(session):
     """Run the unit test suite w/o grpcio installed"""
     default(session, install_grpc=False)
diff --git a/setup.py b/setup.py
index 0c9ad22e..47a3c203 100644
--- a/setup.py
+++ b/setup.py
@@ -88,6 +88,7 @@
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Operating System :: OS Independent",
         "Topic :: Internet",
     ],