diff --git a/Lib/pydoc.py b/Lib/pydoc.py
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -867,8 +867,11 @@
                                                            object.__module__)
             tag += ':<br>\n'
 
-            # Sort attrs by name.
-            attrs.sort(key=lambda t: t[0])
+            # Sort by _fields first and then alphabetically
+            fields = getattr(object, '_fields', [])
+            field_order = {name : i-len(fields) for (i, name) in enumerate(fields)}
+            keyfunc = lambda attr: (field_order.get(attr[0], 0), attr[0])
+            attrs.sort(key=keyfunc)
 
             # Pump out the attrs, segregated by kind.
             attrs = spill('Methods %s' % tag, attrs,
@@ -1286,8 +1289,12 @@
             else:
                 tag = "inherited from %s" % classname(thisclass,
                                                       object.__module__)
-            # Sort attrs by name.
-            attrs.sort()
+
+            # Sort by _fields first and then alphabetically
+            fields = getattr(object, '_fields', [])
+            field_order = {name : i-len(fields) for (i, name) in enumerate(fields)}
+            keyfunc = lambda attr: (field_order.get(attr[0], 0), attr[0])
+            attrs.sort(key=keyfunc)
 
             # Pump out the attrs, segregated by kind.
             attrs = spill("Methods %s:\n" % tag, attrs,