Wilseyville is an unincorporated community in Calaveras County, California. It lies at an elevation of 2769 feet (844 m). Wilseyville's post office was established in 1947; it has the zip code 95257. Wilseyville was named after Lawrence A. Wilsey, an executive at the American Forest Products Company. Wilseyville is notorious for being the location of the cabin where serial killers Leonard Lake and Charles Ng killed and disposed of some of their victims. Their spree ended in June 1985.

Climate

Area has a Köppen Climate Classification of Csb, which is a dry-summer subtropical climate often referred to as "Mediterranean".