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.