diff -r ac176a69d188 Lib/ipaddress.py
--- a/Lib/ipaddress.py	Sun Dec 28 22:14:23 2014 -0600
+++ b/Lib/ipaddress.py	Tue Dec 30 12:51:00 2014 +0200
@@ -563,6 +563,9 @@ class _IPAddressBase(_TotalOrderingMixin
         except ValueError:
             cls._report_invalid_netmask(ip_str)
 
+    def __reduce__(self):
+        return self.__class__, (str(self),)
+
 
 class _BaseAddress(_IPAddressBase):
 
diff -r ac176a69d188 Lib/test/test_ipaddress.py
--- a/Lib/test/test_ipaddress.py	Sun Dec 28 22:14:23 2014 -0600
+++ b/Lib/test/test_ipaddress.py	Tue Dec 30 12:51:00 2014 +0200
@@ -8,6 +8,7 @@ import unittest
 import re
 import contextlib
 import operator
+import pickle
 import ipaddress
 
 
@@ -82,6 +83,13 @@ class CommonTestMixin:
         self.assertRaises(TypeError, hex, self.factory(1))
         self.assertRaises(TypeError, bytes, self.factory(1))
 
+    def pickle_test(self, addr):
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            with self.subTest(proto=proto):
+                x = self.factory(addr)
+                y = pickle.loads(pickle.dumps(x, proto))
+                self.assertEqual(y, x)
+
 
 class CommonTestMixin_v4(CommonTestMixin):
 
@@ -247,6 +255,9 @@ class AddressTestCase_v4(BaseTestCase, C
         assertBadOctet("257.0.0.0", 257)
         assertBadOctet("192.168.0.999", 999)
 
+    def test_pickle(self):
+        self.pickle_test('192.0.2.1')
+
 
 class AddressTestCase_v6(BaseTestCase, CommonTestMixin_v6):
     factory = ipaddress.IPv6Address
@@ -379,6 +390,9 @@ class AddressTestCase_v6(BaseTestCase, C
         assertBadPart("02001:db8::", "02001")
         assertBadPart('2001:888888::1', "888888")
 
+    def test_pickle(self):
+        self.pickle_test('2001:db8::')
+
 
 class NetmaskTestMixin_v4(CommonTestMixin_v4):
     """Input validation on interfaces and networks is very similar"""
@@ -446,6 +460,11 @@ class NetmaskTestMixin_v4(CommonTestMixi
 class InterfaceTestCase_v4(BaseTestCase, NetmaskTestMixin_v4):
     factory = ipaddress.IPv4Interface
 
+    def test_pickle(self):
+        self.pickle_test('192.0.2.0/27')
+        self.pickle_test('192.0.2.0/31')  # IPV4LENGTH - 1
+        self.pickle_test('192.0.2.0')     # IPV4LENGTH
+
 
 class NetworkTestCase_v4(BaseTestCase, NetmaskTestMixin_v4):
     factory = ipaddress.IPv4Network
@@ -500,6 +519,11 @@ class NetmaskTestMixin_v6(CommonTestMixi
         assertBadNetmask("::1", "pudding")
         assertBadNetmask("::", "::")
 
+    def test_pickle(self):
+        self.pickle_test('2001:db8::1000/124')
+        self.pickle_test('2001:db8::1000/127')  # IPV6LENGTH - 1
+        self.pickle_test('2001:db8::1000')      # IPV6LENGTH
+
 
 class InterfaceTestCase_v6(BaseTestCase, NetmaskTestMixin_v6):
     factory = ipaddress.IPv6Interface