Garratt is the surname of:
- Chris Garratt, artist of the Biff (cartoon) team
- Fred Garratt (1888–1967), English footballer
- Herbert William Garratt (1864–1913), mechanical engineer, inventor of the Garratt locomotive
- Humphry Garratt (1898–1974), English cricketer
- Martin Garratt (born 1980), English footballer
- Nick Garratt, Australian rowing coach
- Owen Garratt (born 1968), Canadian artist and musician
- Steve Garratt (born 1953), English cricket umpire
- Wayne Garratt (1968–1992), English speedway rider