St. Mary's Orthodox Cathedral Hauz Khas is an Indian Orthodox church in Delhi.

St. Mary's Orthodox Cathedral Hauz Khas is a place of worship belonging to the Indian (Malankara) Orthodox Church, located in Delhi. Situated within a region where Christianity is a minority religion, the cathedral is noted as one of the major churches in the National Capital Territory of India. The broader Christian community in Delhi encompasses various denominations and traditions, including dioceses and churches established across different eras of the city's history. St. Mary's Orthodox Cathedral Hauz Khas serves as a religious center for its community within the local landscape of Delhi's diverse places of worship.