diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 614be256e..082188cb1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -70,7 +70,7 @@ jobs:
         run: |
           DO_MYPY=1
 
-          if [[ "$V" == "3.9" ]]; then
+          if [[ "$V" == "3.9" || "$V" == "3.15" ]]; then
             DO_MYPY=0
           fi
 
diff --git a/changelog.d/1564.change.md b/changelog.d/1564.change.md
new file mode 100644
index 000000000..83f6eecb5
--- /dev/null
+++ b/changelog.d/1564.change.md
@@ -0,0 +1 @@
+Added support for Python 3.15.
diff --git a/pyproject.toml b/pyproject.toml
index b886fbf2a..cf008ade4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Typing :: Typed",
diff --git a/tox.ini b/tox.ini
index abf3c2fc6..a8401e0d3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,8 +4,8 @@
 min_version = 4.25.0
 env_list =
     pre-commit,
-    py3{9-14}-tests,
-    py3{10-14}-mypy,
+    py3{9-15}-tests,
+    py3{10-14}-mypy,  # some deps lack 3.15 support
     pypy3-tests,
     # Mypy needs to run within the respective Python version
     typing-{pyright,ty,pyrefly}