欧里尼奥斯（葡萄牙语：Ourinhos）是巴西圣保罗州的一个市镇。总面积296.203平方公里，总人口104542人，人口密度352.9人/平方公里。

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Ourinhos is a municipality in the state of São Paulo in Brazil. The population is 110,282 (2015 est.) in an area of 295.82 km (114.22 sq mi). The elevation is 483 metres (1,585 ft).

The municipality of Ourinhos was created in 1919 by separating it from Salto Grande. One version of its etymology is that the name "Ourinhos" (small gold pebbles) is a reference to the old city of Ourinho, on the other side of the Paranapanema river, which today is Jacarezinho, in Paraná state. Today, the city is formed by the town of Ourinhos, which is the only district headquarters, also subdivided into about 120 neighborhoods. It is also one of the main cities in São Paulo state's SW region, having trade and services as its main economic activities. In agriculture, sugar cane, soy, and corn (maize) are the main crops.