Placerville is a populated place in Boise County, Idaho, United States. The population was 53 at the 2010 census. It is part of the Boise City–Na…Placerville is a populated place in Boise County, Idaho, United States. The population was 53 at the 2010 census. It is part of the Boise City–Nampa, Idaho Metropolitan Statistical Area. Placerville received its name because of placer mining in the vicinity. The ghost town is located 17 miles east of Horseshoe Bend. The townsite was selected December 1, 1862; and by December 16 there were six cabins in the camp. By the early summer of 1863, the town had 300 buildings and a population of 5,000. At the meeting of the first legislature held in Lewiston in 1863, the citizens obtained a charter for their city. Father Mesplie, a Catholic priest, held the first church service January 4, 1864, and in that same year a stage line was established between the Basin and Wallua to carry Wells Fargo express. It ran every other day from Placerville and went through in four days. By July 1864, 4500 claims had been recorded in the district.