Quimby is an English surname derived from a toponym such as Quenby. Notable people with the surname include:
Darius Quimby (died 1791), first American law enforcement officer killed in line of dutyEdith Quimby (1891–1982), American medical researcher and physicistFred Quimby (1883–1965), American cartoon producer, best known as a producer of Tom and Jerry cartoonsHarriet Quimby (1875–1912), the first female pilot in the United StatesPhineas Quimby (1802–1866), a 19th-century American philosopherRobert Quimby (born 1976), American astronomerShirley Leon Quimby (1893–1986), American physicistWilliam R. "Bill" Quimby (born 1936), American author