Stepanyan (also commonly spelled Stepanian) (Armenian: Ստեփանյան) is an Armenian surname, derived from Stepan (Armenian: Ստեփան), the Armenian equivalent of Stephen, and could refer to any of the following people:
- Arthur Stepanyan (born 1987), Armenian footballer
- Kalin Stepanyan (born 1955), Russian football coach
- Leo Stepanyan (1931–2002), Soviet and Armenian ornithologist
- Levon Stepanyan (born 1971), Armenian footballer
- Nelson Stepanyan (1913–1944), Soviet pilot
- Vahe Stepanyan (born 1948), Armenian lawyer
- Vardan Stepanyan (1966–1992), Armenian military commander