Coulterville (formerly, Maxwell's Creek) is an unincorporated community in Mariposa County, California. It is located on Maxwell Creek 20 miles (32 km) northwest of Mariposa, at an elevation of 1699 feet (518 m). Coulterville has a population of 1,772. It is a mining town located in the foothills of the Sierra Nevada. The ZIP Code is 95311. The community is inside area code 209.
The place was settled in 1850 by George W. Coulter, for whom it is also named. For a time Coulter lived in a tent flying the American Flag, prompting local Mexicans to call the place Bandereta (Spanish for "small flag"). The Maxwell's Creek post office opened in 1852 and changed its name to Coulterville in 1872. The name Maxwell honors George Maxwell, with whom Coulter cast lots to detemine the name of the town.
In the state legislature Coulterville is located in the 14th Senate District, represented by Republican Dave Cogdill, and in the 25th Assembly District, represented by Republican Tom Berryhill. Federally, Coulterville is located in California's 19th congressional district, which has a Cook PVI of R +10 and is represented by Republican George Radanovich.