Cartmell is a surname. Notable people with the surname include:
- Fraser Cartmell (born 1982), Scottish triathlete
- Jack Cartmell (1890-1979), English footballer and trainer
- Harry Cartmell (1857–1923), English memoirist
- Martha Cartmell (1846–1945), Canadian Methodist/United Church missionary and educator in Japan
- Nathaniel Cartmell (1883–1967), American athlete
- Tim Cartmell (21st century), American martial artist