diff --git a/doc/source/whatsnew/v1.0.0.rst b/doc/source/whatsnew/v1.0.0.rst
index cd7c78112252d7..f231c2b31abb13 100644
--- a/doc/source/whatsnew/v1.0.0.rst
+++ b/doc/source/whatsnew/v1.0.0.rst
@@ -376,6 +376,7 @@ or ``matplotlib.Axes.plot``. See :ref:`plotting.formatters` for more.
 
 **Other removals**
 
+- Removed the previously deprecated :meth:`Index.summary` (:issue:`18217`)
 - Removed the previously deprecated :meth:`Series.get_value`, :meth:`Series.set_value`, :meth:`DataFrame.get_value`, :meth:`DataFrame.set_value` (:issue:`17739`)
 - Changed the the default value of `inplace` in :meth:`DataFrame.set_index` and :meth:`Series.set_axis`. It now defaults to False (:issue:`27600`)
 - Removed support for nested renaming in :meth:`DataFrame.aggregate`, :meth:`Series.aggregate`, :meth:`DataFrameGroupBy.aggregate`, :meth:`SeriesGroupBy.aggregate`, :meth:`Rolling.aggregate` (:issue:`18529`)
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index 10c0f465f69da6..dd38bd0ee5f70e 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -1132,19 +1132,6 @@ def _summary(self, name=None):
             name = type(self).__name__
         return f"{name}: {len(self)} entries{index_summary}"
 
-    def summary(self, name=None):
-        """
-        Return a summarized representation.
-
-        .. deprecated:: 0.23.0
-        """
-        warnings.warn(
-            "'summary' is deprecated and will be removed in a future version.",
-            FutureWarning,
-            stacklevel=2,
-        )
-        return self._summary(name)
-
     # --------------------------------------------------------------------
     # Conversion Methods
 
diff --git a/pandas/tests/indexes/test_base.py b/pandas/tests/indexes/test_base.py
index 95fc078edb7afe..665839e930a9dd 100644
--- a/pandas/tests/indexes/test_base.py
+++ b/pandas/tests/indexes/test_base.py
@@ -1385,13 +1385,6 @@ def test_summary_bug(self):
         assert "~:{range}:0" in result
         assert "{other}%s" in result
 
-    # GH18217
-    def test_summary_deprecated(self):
-        ind = Index(["{other}%s", "~:{range}:0"], name="A")
-
-        with tm.assert_produces_warning(FutureWarning):
-            ind.summary()
-
     def test_format(self, indices):
         self._check_method_works(Index.format, indices)