马扎冈（葡萄牙语：Marzagão）是巴西戈亚斯州的一个市镇。总面积228.091平方公里，总人口2301人，人口密度10.1人/平方公里。

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Marzagão is a municipality in south Goiás state, Brazil.

Marzagão is located in the Meia Ponte Microregion in the extreme south of the state, less than 100 km (62 mi) north of the great Itumbiara reservoir, which forms the boundary with the state of Minas Gerais. There are paved road connections with Água Limpa, 22 km (14 mi), and Caldas Novas, 33 km (21 mi).