Jamestown is a census-designated place in Tuolumne County, California, United States. The population was 3,433 at the 2010 census, up from 3,017 at the 2000 census. Formerly a California Gold Rush town, Jamestown is now a California Historical Landmark. Jamestown is the home of Railtown 1897 State Historic Park and the Sierra Railway, which operates steam passenger trains.A scene from the movie Hidalgo was filmed in Jamestown. Exterior scenes from the TV series Petticoat Junction, The Wild Wild West, and Green Acres were filmed in and near Jamestown, as well as parts of Little House on the Prairie TV series.