Republic of Crimea may refer to:
- Republic of Crimea, a federal subject of Russia
- Republic of Crimea, a short-lived country that declared its independence from Ukraine in 2014
- Autonomous Republic of Crimea, the autonomous republic of Ukraine
- Crimean Autonomous Soviet Socialist Republic (1921–1992), autonomous Soviet Socialist republic within the Ukrainian SSR, Soviet Union
- Crimean People's Republic, a short-lived secular Muslim state which existed from December 1917 to January 1918