Lemp may refer to:
Lemp family, brewers in St. Louis, Missouri, and places named after them:
- Lemp Mansion
- Lemp Neighborhood Arts Center
- Rebecca Lemp (d. 1590), German woman accused of witchcraft and burned at the stake
- Fritz-Julius Lemp (1913–1941), U-boat commander during World War II
- LEMP: Lightning Electromagnetic Pulse
- LEMP software stack - A variation on the LAMP software bundle that uses Nginx rather than Apache. Also known as LNMP.
Lemp (Dill) is a river of Hesse, Germany.