Cun may refer to:
- Cun (unit), a traditional Chinese unit of measure
- Villages of China (Chinese: 村, pinyin: cun)
- Cún, a village in Hungary
- Conn (nautical), a variant spelling meaning to command the movements of a ship at sea
CUN may refer to:
- Cancún International Airport, IATA code: CUN
- Central University for Nationalities, the former English name of the Minzu University of China, Beijing, China
- Consiglio Universitario Nazionale (‘National University Council’), in Italy
- Courant d'Union Nationale, in Cameroon