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is the county seat of Tuolumne County, California. As of the 2000 census, the city population was 4,423. Sonora is the only incorporated community in Tuolumne County.
Sonora is located at , around the intersection of California State Highways 49 and 108 The altitude is 1,825ft/556m.
According to the United States Census Bureau, the city has a total area of 3.0 square miles (7.9 km²), all of it land.