George Washington (1732-1799) is on the U.S. one dollar bill. This riddle by comedian Jay Leno was printed in his book Jay Leno’s How to Be the Funniest Kid in the Whole Wide World (2005) and in many newspapers in September 2007:
   
Q: What’s the main difference between a duck and George Washington?
A: One has a bill on his face, the other has his face on a bill.
   
This version was printed in Boys’ Life magazine in October 2009:
     
Q: What’s the difference between George Washington and a duck?
A: One has his face on a bill, and the other has a bill on his face!
       
     
Google Books
Jay Leno’s How to Be the Funniest Kid in the Whole Wide World (or Just in Your Class)
By Jay Leno
New York, NY: Aladdin Paperbacks
2007 (first published in 2005)
Pg. 12:
What’s the main difference between a duck and George Washington?
One has a bill on his face, the other has his face on a bill.
 
Newspapers.com
25 September 2007, Daily News (New York, NY), “Funny Lessons” by Jay Leno, Life sec., pg. 11, col. 4:
What’s the main difference between a duck and George Washington?
One has a bill on his face, the other has his face on a bill.
 
Newspapers.com
31 March 2007, Newsday (Long Island, NY), Kidsday sec., pg. C16:         
What’s the main difference between a duck and George Washington?
One has a bill on his face, the other his face on a bill.
Christopher Temple
 
Google Books
October 2009, Boys’ Life, “Think & Grin,” pg. 60, col. 3:
Tony: What’s the difference between George Washington and a duck?
Joe: I have no clue.
Tony: One has his face on a bill, and the other has a bill on his face!
Anthony Horton, Loudonville, N.Y
       
,a href=“https://twitter.com/klobetime/status/17589947204”>Twitter 
Michael Klobe
@klobetime
What is the difference between a duck and George Washington? One has a bill on his face; the other has his face on a bill!
2:12 PM · Jul 2, 2010·Digsby
   
Twitter
ComFi
@Comfi
The difference between a duck and
George Washington is: One has a   bill on his face; the other has his face on a bill!
11:10 AM · Jul 3, 2010·Facebook
 
Twitter
melbabi
@melbabi
What’s the difference between George Washington and a duck? A duck has a bill on his face and GW has his face on a bill!
1:26 PM · Nov 23, 2010·Twitter Web Client
 
Google Books
December 2012, Boys’ Life, “Think & Grin,” pg. 63, col. 3:
Shalin: What’s the difference between George Washington and a duck?
Mort: What?
Shalin: A duck has a bill on its face, and George Washington has his face on a bill!
Shalin Jain, Norcross, Ga.
   
Twitter
dadwright
@dadwright
“What is the difference between George Washington and a duck?  One has a bill on his face and the other has his face on a bill!!”
9:37 AM · Jul 7, 2014·Twitter Web Client
   
Twitter
Frank James
@franklin_duane
Q: What is the difference between George Washington and a duck?
A: One has his face on a bill, while the other has a bill on it’s face.
4:10 PM · Jul 8, 2018·Facebook
 
Reddit—Dadjokes
Posted by u/cleverbutnotoverlyso July 4, 2019
A 4th of July riddle:
What’s the difference between George Washington and a duck?
One has his face on a bill and the other has a bill on his face.
Be safe this holiday and have a great weekend !!!
   
Reddit—Jokes
Posted by u/prankerjoker July 13, 2019
What’s the difference between a duck and George Washington?
One has a bill on their face and the other has their face on a bill.
 
Reddit—Dadjokes
Posted by u/zu-den-sternen July 3, 2021
4th of July dad joke
The difference between George Washington and a duck? One has his face on a bill and the other has a bill on his face.