卡斯特罗波尔（西班牙语：Castropol），是西班牙阿斯图里亚斯的一个市镇。总面积126平方公里，总人口4222人（2001年），人口密度34人/平方公里。

Castropol is a municipality in Asturias, Spain. It is also the name of a parish within the municipality and a town within the parish.

The municipality of Castropol has a population of 3696 (INE, 2014). It is bounded on the north by the Cantabrian Sea and on the west by a coastal inlet, or ria, which separates it from the municipality of Ribadeo in Galicia. To the west it is bordered by Tapia de Casariego, by El Franco, Boal and other Asturian municipalities, and to the south by Vegadeo and Villanueva de Oscos.