El Dorado County, California along with the population since the 1960 Winter Olympics, hosted at Squaw Valley Ski Resort in neighboring Placer County. The present-day site of El Dorado County was once home to the Maidu, Washoe, and Miwok Native American tribes, and is notable for being the site of the 1848 gold discovery that sparked the California Gold Rush. The County of El Dorado was one of California's original 27 counties created effective February 18, 1850 (the number has risen to 58 today). Its name is derived from the Spanish meaning "the gilded/golden". The final segments of the Pony Express mail route ran
El Dorado County, California the federal Agency for Toxic Substances and Disease Registry found that some student athletes, coaches and school workers had received substantial exposures. The inside of the school needed to be cleaned of dust. The population ranking of the following table is based on the 2010 census of El Dorado County. † "county seat" El Dorado County, California El Dorado County, officially the County of El Dorado, is a county in the U.S. state of California. As of the 2010 census, the population was 181,058. The county seat is Placerville. El Dorado County is part of the Sacramento-Roseville-Arden-Arcade, CA Metropolitan Statistical