马普托湾（葡萄牙语：Baía de Maputo）是非洲东部的海湾，位于莫桑比克沿岸的莫桑比克海峡南部，长约112公里、宽25至40公里，最大深度16米，潮汐高度1.8至5米，主要城市有马普托。

Maputo Bay (Baía de Maputo), formerly Delagoa Bay, Baía da Lagoa (in Portuguese) is an inlet of the Indian Ocean on the coast of Mozambique, between 25° 40' and 26° 20' S, with a length from north to south of over 90 km long and 32 km wide.