Saint Sarkis Cathedral (Armenian: Սուրբ Սարգիս մայր տաճար, Surp Sarkis mayr tachar, is an Armenian Apostolic church in Tehran, Iran, completed in 1970 and named after Saint Sarkis the Warrior. It is the cathedral of the Armenian Diocese of Tehran, one of three Armenian dioceses in Iran, whose prelate is archbishop Sepuh Sargsyan.

Iranian Armenians, also known as Persian Armenians, are Iranians of Armenian ethnicity who may speak Armenian as their first language. Estimates of their number in Iran range from 70,000 to 500,000. Areas with a high concentration of them include Tabriz, Tehran, Salmas and Isfahan's Jolfa quarter.