A peninsula is a piece of land bordered by water on three sides.
Peninsula may also refer to:
- Peninsula Campaign of the American Civil War
- Peninsular War of 1808
- Peninsula Shield Force, a military alliance of the Middle East
- Peninsula, Ohio, a village in Summit County, Ohio
- The Peninsula Hotels, a chain of luxury hotels founded in 1928
- Peninsula (film), a 2020 South Korean zombie film by Yeon Sang-ho