Barrett obtained a B.F.A. in 1962 from the Pratt Institute. She married the artist Ron Barrett, who illustrated some of her most popular books. After they divorced, they continued to collaborate on books for many years. She currently resides in Brooklyn, New York.
- Old MacDonald Had an Apartment House (illustrated by Ron Barrett), 1969
- Animals Should Definitely Not Wear Clothing (illustrated by Ron Barrett), 1970
- An Apple a Day (illustrated by Tim Lewis), 1973
- Benjamin's 365 Birthdays (illustrated by Ron Barrett), 1974
- Peter's Pocket (illustrated by Julia Noonan), 1974
- I Hate to Take a Bath (illustrated by Charles B. Slackman), 1975
- I Hate to Go to Bed (illustrated by Ray Cruz), Four Winds Press, 1977
- The Wind Thief (illustrated by Diane Dawson), 1977
- Cloudy with a Chance of Meatballs (illustrated by Ron Barrett), 1978
- Animals Should Definitely Not Act Like People (illustrated by Ron Barrett), 1980
- I'm Too Small, You're Too Big (illustrated by David S. Rose), 1981
- A Snake Is Totally Tail (illustrated by L. S. Johnson), 1983
- What's Left?, 1983
- Pickles Have Pimples, and Other Silly Statements (illustrated by L. S. Johnson), 1986
- Pickles to Pittsburgh: The Sequel to Cloudy With a Chance of Meatballs (illustrated by Ron Barrett), 1997
- Old MacDonald Had an Apartment House (illustrated by Ron Barrett), 1998
- The Things That Are Most in the World (illustrated by John Nickle), 1998
- I Know Two Who Said Moo: A Counting and Rhyming Book (illustrated by Daniel Moreton), 2000
- Which Witch Is Which? (illustrated by Sharleen Collicott), 2001
- Never Take a Shark to the Dentist (and Other Things Not To Do) (illustrated by John Nickle), 2008
- The Marshmallow Incident (illustrated by Ron Barrett), 2009
- The Complete Cloudy with a Chance of Meatballs (illustrated by Ron Barrett), 2009
- Santa from Cincinnati (illustrated by Kevin Hawks), 2012
- Planet of the Pies: Cloudy with a Chance of Meatballs 3 (illustrated by Isidre Monés), 2013
- "Barrett, Judi 1941-". Children's Literature Review. January 1, 2004. Retrieved November 10, 2012.
- Judy Klemesrud (February 2, 1976). "Still Friends at Work, Even After the Bitterness of Divorce". New York Times. p. 39.
Judi and Ron Barrett continued doing children's books after their marriage broke up. ... They are currently working on one called 'Cloudy, with the Chance of Meatballs'....
- Stephen Schaefer (September 18, 2009). "'Meatballs' satisfies creators’ hunger to see their work on big screen". Boston Herald. Retrieved November 10, 2012.
Judi and Ron Barrett collaborated on the now-classic children’s book 'Cloudy with a Chance of Meatballs,' but the long-divorced couple are no longer a team.
- "Judi Barrett (Official Publisher Page)". Simon & Schuster. Retrieved November 10, 2012.