奥西洛（意大利语：Osilo），是意大利萨萨里省的一个市镇。总面积98.19平方公里，人口3268人，人口密度33.3人/平方公里（2009年）。ISTAT代码为090050。

Osilo (Sardinian:Osile) is a comune (municipality) in the Province of Sassari in the Italian region Sardinia, located about 170 kilometres (110 mi) north of Cagliari and about 10 kilometres (6 mi) east of Sassari. It is part of the Anglona traditional region. The municipality of Osilo contains the frazioni (subdivisions, mainly villages and hamlets) Santa Vittoria and San Lorenzo.