Wilseyville is an unincorporated community in Calaveras County, California.

Wilseyville's post office was established in 1947;[2] it has the zip code 95257.

Wilseyville was named after Lawrence A. Wilsey, an executive at the American Forest Products Company.

[2] 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.

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