Tilby is an English surname. It was first found in Essex at Tilbury, a town in the borough of Thurrock. People Notable people with the surname include:
Angela Tilby (born 1950), English author and Anglican priest Trish Tilby, American fictional cartoon character Wendy Tilby (born 1960), Canadian animator A. Wyatt Tilby (1880–1948), English author, journalist and traveller