迪亚曼蒂努（葡萄牙语：Diamantino）是巴西马托格罗索州的一个市镇。总面积7630.212平方公里，总人口18634人，人口密度2.4人/平方公里。

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Diamantino is a municipality in Mato Grosso state in Brazil. It has a population of 18.580, and is near Diamantino River. It is 1837 feet above sea-level, and sits at the foot of the Mato Grosso plateau. Its history dates from 1730 as a gold mining settlement. In 1746, diamonds were discovered, which made the town's population swell and prosper. The amount of diamonds was greatly overestimated, and the town population steadily declined.