El Dorado (Spanish for The golden; formerly Eldorado, Mud Spring, and Mud Springs), not to be confused with the nearby El Dorado Hills, is an unincorporated community in El Dorado County, California. It is located 4 miles (6.4 km) southwest of Placerville, at an elevation of 1608 feet (490 m). The population was 4,096 at the 2000 census. The town is registered as California Historical Landmark #486. The ZIP code is 95623. The community is inside area code 530.
El Dorado, "The Gilded One", was first known as Mud Springs from the boggy quagmire the cattle and horses made of a nearby watering place. Originally an important camp on the old Carson Trail, by 1849-50 it had become the center of a mining district and the crossroads for freight and stagecoach lines. At the height of the rush its large gold production supported a population of several thousand. It was incorporated as the town of El Dorado in 1856.
In the state legislature El Dorado is located in the 1st Senate District, represented by Republican Dave Cox, and in the 4th Assembly District, represented by Republican Ted Gaines. Federally, El Dorado is located in California's 4th congressional district, which has a Cook PVI of R +11 and is represented by Republican Tom McClintock.