Cartoon Art Museum
San Francisco, CA
http://cartoonart.org/
Michigan State University
East Lansing, MI
Comic art collection at MSU LIbrary.
http://comics.lib.msu.edu/
Museum of Comic and Cartoon Art (MoCCA)
New York, NY
http://www.moccany.org/
Ohio State University
Columbus, OH
Billy Ireland Cartoon Library & Museum
http://cartoons.osu.edu/