Rio Oso, CA is a city located in Sutter County, California and has a land area of 31.86 square miles (82.52 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Rio Oso, California and it is 95674. The area code(s) for Rio Oso is 530/916.
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