Sleath is a surname. Notable people by that name include:
- Danny Sleath (born 1986), English footballer.
- David Sleath, chief executive of SEGRO plc.
- Eleanor Sleath, English novelist.
- Gabriel Sleath (1674–1756), London gold- and silversmith.
- Richard Sleath (1863–1922), Australian politician.
- William Boultbee Sleath (c. 1763–1843), English teacher and clergyman.