The Dolmabahçe Mosque is a baroque waterside mosque in Kabataş in the Beyoğlu district of Istanbul, Turkey, close to the Dolmabahçe Palace. It was commissioned by Queen Mother Bezmialem Valide Sultan and designed by the Turkish Armenian architect, Garabet Balyan in 1855. After his mother's death, Sultan Abdülmecid saw the building work through to completion.

The mosque has twin minarets and is distinguished by the huge stone arches on its facades which are cut with large windows, allowing light to flood the interior.

From 1956-60 the mosque provided a venue for the Naval Museum, only resuming prayer services in 1967. Road-widening robbed it of its courtyard and sebil that were originally part of the design.