El Dorado County is a county located in the Gold Country of the U.S. state of California, in the Sierra Nevada. Its 2004 population was estimated to be 172,889, its 2000 population was 156,299. The county seat is Placerville. El Dorado County was one of the original counties of California, created in 1850 at the time of statehood. Parts of the county's territory were given to Amador County in 1854 and to Alpine County in 1864. According to the U.S. Census Bureau, the county has a total area of 4,631 km² (1,788 mi²). 4,431 km² (1,711 mi²) of it is land and 200 km² (77 mi²) of it is water. The total area is 4.32% water.