Lashkar (Persian: لشکر) may refer to:
- Lascar, a type of sailor or militiaman employed by the British in South Asia (modern Bangladesh, India, and Pakistan)
- Laskhar (novel), a novel by Mukul Deva
- Lashkar Gah, a city in southern Afghanistan
- Lashkar, an area of the city of Gwalior, formerly a separate town
- Lashkar-e-Jhangvi, a militant organization in Pakistan
- Lashkar-e-Omar, a Pakistani Islamic fundamentalist organization
- Lashkar-e-Qahhar, an Islamist group that claimed responsibility for the 11 July 2006 Mumbai Train Bombings
- Lashkar-e-Toiba, an Islamist terrorist organization in South Asia