diff --git a/docs/faq/install.txt b/docs/faq/install.txt
index e54336882b..1618d40c8e 100644
--- a/docs/faq/install.txt
+++ b/docs/faq/install.txt
@@ -50,8 +50,10 @@ What Python version can I use with Django?
 ============== ===============
 Django version Python versions
 ============== ===============
-2.2            3.5, 3.6, 3.7, 3.8 (added in 2.2.8)
-3.0, 3.1, 3.2  3.6, 3.7, 3.8
+2.2            3.5, 3.6, 3.7, 3.8 (added in 2.2.8), 3.9 (added in 2.2.17)
+3.0            3.6, 3.7, 3.8, 3.9 (added in 3.0.11)
+3.1            3.6, 3.7, 3.8, 3.9 (added in 3.1.3)
+3.2            3.6, 3.7, 3.8, 3.9
 ============== ===============
 
 For each version of Python, only the latest micro release (A.B.C) is officially
diff --git a/docs/releases/2.2.17.txt b/docs/releases/2.2.17.txt
new file mode 100644
index 0000000000..d574de6574
--- /dev/null
+++ b/docs/releases/2.2.17.txt
@@ -0,0 +1,7 @@
+===========================
+Django 2.2.17 release notes
+===========================
+
+*Expected November 2, 2020*
+
+Django 2.2.17 adds compatibility with Python 3.9.
diff --git a/docs/releases/2.2.txt b/docs/releases/2.2.txt
index 3f21c55b18..315c013771 100644
--- a/docs/releases/2.2.txt
+++ b/docs/releases/2.2.txt
@@ -23,9 +23,9 @@ end in April 2020.
 Python compatibility
 ====================
 
-Django 2.2 supports Python 3.5, 3.6, 3.7, and 3.8 (as of 2.2.8). We
-**highly recommend** and only officially support the latest release of each
-series.
+Django 2.2 supports Python 3.5, 3.6, 3.7, 3.8 (as of 2.2.8), and 3.9 (as of
+2.2.17). We **highly recommend** and only officially support the latest release
+of each series.
 
 .. _whats-new-2.2:
 
diff --git a/docs/releases/3.0.11.txt b/docs/releases/3.0.11.txt
new file mode 100644
index 0000000000..a5009feb51
--- /dev/null
+++ b/docs/releases/3.0.11.txt
@@ -0,0 +1,7 @@
+===========================
+Django 3.0.11 release notes
+===========================
+
+*Expected November 2, 2020*
+
+Django 3.0.11 adds compatibility with Python 3.9.
diff --git a/docs/releases/3.0.txt b/docs/releases/3.0.txt
index 284782d80c..1c39980a91 100644
--- a/docs/releases/3.0.txt
+++ b/docs/releases/3.0.txt
@@ -19,8 +19,8 @@ project.
 Python compatibility
 ====================
 
-Django 3.0 supports Python 3.6, 3.7, and 3.8. We **highly recommend** and only
-officially support the latest release of each series.
+Django 3.0 supports Python 3.6, 3.7, 3.8, and 3.9 (as of 3.0.11). We **highly
+recommend** and only officially support the latest release of each series.
 
 The Django 2.2.x series is the last to support Python 3.5.
 
diff --git a/docs/releases/3.1.3.txt b/docs/releases/3.1.3.txt
index e1665c2ee5..4236efce1b 100644
--- a/docs/releases/3.1.3.txt
+++ b/docs/releases/3.1.3.txt
@@ -4,7 +4,8 @@ Django 3.1.3 release notes
 
 *Expected November 2, 2020*
 
-Django 3.1.3 fixes several bugs in 3.1.2.
+Django 3.1.3 fixes several bugs in 3.1.2 and adds compatibility with Python
+3.9.
 
 Bugfixes
 ========
diff --git a/docs/releases/3.1.txt b/docs/releases/3.1.txt
index b723d0c566..730d0b682a 100644
--- a/docs/releases/3.1.txt
+++ b/docs/releases/3.1.txt
@@ -19,8 +19,8 @@ project.
 Python compatibility
 ====================
 
-Django 3.1 supports Python 3.6, 3.7, and 3.8. We **highly recommend** and only
-officially support the latest release of each series.
+Django 3.1 supports Python 3.6, 3.7, 3.8, and 3.9 (as of 3.1.3). We **highly
+recommend** and only officially support the latest release of each series.
 
 .. _whats-new-3.1:
 
diff --git a/docs/releases/3.2.txt b/docs/releases/3.2.txt
index ab1d4dfb9a..5ab05a1dba 100644
--- a/docs/releases/3.2.txt
+++ b/docs/releases/3.2.txt
@@ -23,8 +23,8 @@ end in April 2022.
 Python compatibility
 ====================
 
-Django 3.2 supports Python 3.6, 3.7, and 3.8. We **highly recommend** and only
-officially support the latest release of each series.
+Django 3.2 supports Python 3.6, 3.7, 3.8, and 3.9. We **highly recommend** and
+only officially support the latest release of each series.
 
 .. _whats-new-3.2:
 
diff --git a/docs/releases/index.txt b/docs/releases/index.txt
index 5248be5f64..c9fd871ae5 100644
--- a/docs/releases/index.txt
+++ b/docs/releases/index.txt
@@ -42,6 +42,7 @@ versions of the documentation contain the release notes for any later releases.
 .. toctree::
    :maxdepth: 1
 
+   3.0.11
    3.0.10
    3.0.9
    3.0.8
@@ -59,6 +60,7 @@ versions of the documentation contain the release notes for any later releases.
 .. toctree::
    :maxdepth: 1
 
+   2.2.17
    2.2.16
    2.2.15
    2.2.14
diff --git a/setup.cfg b/setup.cfg
index d5a202851b..43ba86120b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,6 +20,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
     Topic :: Internet :: WWW/HTTP
     Topic :: Internet :: WWW/HTTP :: Dynamic Content
     Topic :: Internet :: WWW/HTTP :: WSGI
diff --git a/tox.ini b/tox.ini
index 61081a3744..1b89a965f1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ passenv = DJANGO_SETTINGS_MODULE PYTHONPATH HOME DISPLAY OBJC_DISABLE_INITIALIZE
 setenv =
     PYTHONDONTWRITEBYTECODE=1
 deps =
-    py{3,36,37,38}: -rtests/requirements/py3.txt
+    py{3,36,37,38,39}: -rtests/requirements/py3.txt
     postgres: -rtests/requirements/postgres.txt
     mysql: -rtests/requirements/mysql.txt
     oracle: -rtests/requirements/oracle.txt