Doreen Cronin is an American author of children's books, most notably the award-winning Click Clack Moo: Cows That Type.
Born in New York and growing up on Long Island, Cronin she published in 2003 her first book, Diary of a Spider, with a 2005 sequel, Diary of a Worm. She attempted law school, eventually completing it around the same time that Click Clack Moo was completed. Click Clack Moo was later published, winning a number of awards and being named a finalist for the Caldecott Medal. Cronin currently lives in New York with her husband Andrew and her daughter.