diff --git a/doc/api/next_api_changes/deprecations/26295-AL.rst b/doc/api/next_api_changes/deprecations/26295-AL.rst
new file mode 100644
index 000000000000..f62d40991196
--- /dev/null
+++ b/doc/api/next_api_changes/deprecations/26295-AL.rst
@@ -0,0 +1,3 @@
+``inset_location.InsetPosition`` is deprecated
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Use `~.Axes.inset_axes` instead.
diff --git a/lib/mpl_toolkits/axes_grid1/inset_locator.py b/lib/mpl_toolkits/axes_grid1/inset_locator.py
index 9d350510742f..312ab1e887c6 100644
--- a/lib/mpl_toolkits/axes_grid1/inset_locator.py
+++ b/lib/mpl_toolkits/axes_grid1/inset_locator.py
@@ -13,6 +13,7 @@
 from .parasite_axes import HostAxes
 
 
+@_api.deprecated("3.8", alternative="Axes.inset_axes")
 class InsetPosition:
     @_docstring.dedent_interpd
     def __init__(self, parent, lbwh):
diff --git a/lib/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py b/lib/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py
index b61574787772..2794f562deb0 100644
--- a/lib/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py
+++ b/lib/mpl_toolkits/axes_grid1/tests/test_axes_grid1.py
@@ -691,7 +691,8 @@ def test_rgb_axes():
 def test_insetposition():
     fig, ax = plt.subplots(figsize=(2, 2))
     ax_ins = plt.axes([0, 0, 1, 1])
-    ip = InsetPosition(ax, [0.2, 0.25, 0.5, 0.4])
+    with pytest.warns(mpl.MatplotlibDeprecationWarning):
+        ip = InsetPosition(ax, [0.2, 0.25, 0.5, 0.4])
     ax_ins.set_axes_locator(ip)