波尔泰里尼亚（葡萄牙语：Porteirinha）是巴西米纳斯吉拉斯州的一个市镇。总面积1806.25平方公里，总人口36864人，人口密度20.4人/平方公里。

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Porteirinha is a municipality in the northern region of Minas Gerais, Brazil. The population in 2007 was 36,864 in an area of 1,806 km². The elevation is 566 meters. It became a municipality in 1938. The postal code (CEP) is 39520-000.

Porteirinha is part of the statistical microregion of Janaúba. It is 37 kilometers to the northwest of this regional center and is connected by paved highway.