贝尔蒂奥加（葡萄牙语：Bertioga）是巴西圣保罗州的一个市镇。总面积492平方公里，总人口43763人，人口密度88.9人/平方公里。

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Bertioga is a Brazilian municipality of the state of São Paulo in the Baixada Santista. It is part of the Metropolitan Region of Baixada Santista. The population is 56,555 (2015 est.) in an area of 490.15 km². Because it neighbors resort towns, its population fluctuates greatly with the seasons. The more northern parts are dense forests and are virtually unpopulated. The municipality was created in 1995. Prior to that it was a part of Santos.