diff -r 57e5409a998e Lib/idlelib/PyShell.py
--- a/Lib/idlelib/PyShell.py	Wed Mar 13 13:43:23 2013 -0700
+++ b/Lib/idlelib/PyShell.py	Wed Mar 13 19:11:54 2013 -0700
@@ -16,6 +16,7 @@
 
 import linecache
 from code import InteractiveInterpreter
+from platform import python_version
 
 try:
     from tkinter import *
@@ -799,7 +800,7 @@
 
 class PyShell(OutputWindow):
 
-    shell_title = "Python Shell"
+    shell_title = "Python %s Shell" % python_version()
 
     # Override classes
     ColorDelegator = ModifiedColorDelegator
diff -r 57e5409a998e Misc/ACKS
--- a/Misc/ACKS	Wed Mar 13 13:43:23 2013 -0700
+++ b/Misc/ACKS	Wed Mar 13 19:11:54 2013 -0700
@@ -1359,3 +1359,4 @@
 Kai Zhu
 Tarek Ziadé
 Peter Åstrand
+Edmond Burnett
diff -r 57e5409a998e Misc/NEWS
--- a/Misc/NEWS	Wed Mar 13 13:43:23 2013 -0700
+++ b/Misc/NEWS	Wed Mar 13 19:11:54 2013 -0700
@@ -280,6 +280,8 @@
 Library
 -------
 
+- Issue #17390: Display Python version number in IDLE shell title bar.
+
 - Issue #17099: Have importlib.find_loader() raise ValueError when __loader__
   is not set, harmonizing with what happens when the attribute is set to None.