Big Oak Flat, CA is a city located in Tuolumne County, California and has a land area of 58.26 square miles (150.89 km2). The water area for the city is 2.25 square miles or 5.83 km2. There is one unique zip code in Big Oak Flat, California and it is 95305. The area code(s) for Big Oak Flat is 209.
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