Judy is the surname of:
Eric Judy (born 1974), American musician John F. Judy (1856–1931), founder of Judyville, Indiana Samuel Judy (1773–1838), American pioneer and legislator Steven Judy (1956–1981), American mass murderer Thomas Judy (1804–1879), American legislator Phillip Judy, founder of the Judy Company
Fictional characters Doug Judy, recurring character on the American television series Brooklyn Nine-Nine