曼加拉蒂巴（葡萄牙语：Mangaratiba）是巴西里约热内卢州的一个市镇。总面积351.653平方公里，总人口32533人，人口密度92.5人/平方公里。

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Mangaratiba (Portuguese pronunciation: [mɐ̃ˈɡaɾaˈtʃibɐ]) is a municipality located in the Brazilian state of Rio de Janeiro. Its population is 29,272 (2005) and its area is 352 km².

Many large bulk carriers enter the port of Mangaratiba, fetching heavy loads of iron ore bound for especially European ports. As such, the port of Mangaratiba is one of the largest in Brazil.