diff --git a/pandas/core/arrays/categorical.py b/pandas/core/arrays/categorical.py
index 7e3bf33f411bb..a4d6c0f3cd832 100644
--- a/pandas/core/arrays/categorical.py
+++ b/pandas/core/arrays/categorical.py
@@ -1163,6 +1163,17 @@ def add_categories(self, new_categories, inplace=no_default):
         remove_categories : Remove the specified categories.
         remove_unused_categories : Remove categories which are not used.
         set_categories : Set the categories to the specified ones.
+
+        Examples
+        --------
+        >>> c = pd.Categorical(['c', 'b', 'c'])
+        >>> c
+        ['c', 'b', 'c']
+        Categories (2, object): ['b', 'c']
+
+        >>> c.add_categories(['d', 'a'])
+        ['c', 'b', 'c']
+        Categories (4, object): ['b', 'c', 'd', 'a']
         """
         if inplace is not no_default:
             warn(
@@ -1227,6 +1238,17 @@ def remove_categories(self, removals, inplace=no_default):
         add_categories : Add new categories.
         remove_unused_categories : Remove categories which are not used.
         set_categories : Set the categories to the specified ones.
+
+        Examples
+        --------
+        >>> c = pd.Categorical(['a', 'c', 'b', 'c', 'd'])
+        >>> c
+        ['a', 'c', 'b', 'c', 'd']
+        Categories (4, object): ['a', 'b', 'c', 'd']
+
+        >>> c.remove_categories(['d', 'a'])
+        [NaN, 'c', 'b', 'c', NaN]
+        Categories (2, object): ['b', 'c']
         """
         if inplace is not no_default:
             warn(
@@ -1286,6 +1308,23 @@ def remove_unused_categories(self, inplace=no_default):
         add_categories : Add new categories.
         remove_categories : Remove the specified categories.
         set_categories : Set the categories to the specified ones.
+
+        Examples
+        --------
+        >>> c = pd.Categorical(['a', 'c', 'b', 'c', 'd'])
+        >>> c
+        ['a', 'c', 'b', 'c', 'd']
+        Categories (4, object): ['a', 'b', 'c', 'd']
+
+        >>> c[2] = 'a'
+        >>> c[4] = 'c'
+        >>> c
+        ['a', 'c', 'a', 'c', 'c']
+        Categories (4, object): ['a', 'b', 'c', 'd']
+
+        >>> c.remove_unused_categories()
+        ['a', 'c', 'a', 'c', 'c']
+        Categories (2, object): ['a', 'c']
         """
         if inplace is not no_default:
             warn(