The Great Mosque of Porto-Novo () is a mosque in Porto-Novo, Ouémé Department, Benin.
The construction of the mosque started in 1912 and completed in 1925 during the French Dahomey. It was recently declared a historical monument by Porto-Novo city government.
The Afro-Brazilians architectural-style mosque was constructed resembling a chapel with a long central hall and shallow vaulted roof. The front facade is decorated with floral, vegetable and scrolled stucco molding.