City and commune in Ouémé, Benin Porto-Novo Hogbonu, Àjàshé Ilé City and commune View of Porto-Novo Flag Porto-Novo Location of Porto-Novo in Benin Coordinates: 6°29′50″N 2°36′18″E﻿ / ﻿6.49722°N 2.60500°E﻿ / 6.49722; 2.60500Coordinates: 6°29′50″N 2°36′18″E﻿ / ﻿6.49722°N 2.60500°E﻿ / 6.49722; 2.60500 Country Benin Department Ouémé Established 16th century Government • Mayor Emmanuel Zossou Area • City and commune 110 km2 (40 sq mi) • Metro 110 km2 (40 sq mi) Elevation 38 m (125 ft) Population (2009)[1] • City and commune 267,191 • Density 2,400/km2 (6,300/sq mi) Website Official website