乌尼昂港（葡萄牙语：Porto União）是巴西圣卡塔琳娜州的一个市镇。总面积851.24平方公里，总人口33095人，人口密度38.9人/平方公里。

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Porto União is a city located in the Northern Plateau in the State of Santa Catarina and in the left bank of Iguazu River, bordering the city of União da Vitória, Paraná. In 2006, its population was estimated in 33,318 inhabitants.