Chilenchus is a genus of nematodes in the family Tylenchidae. The name comes from Chile, the country from where it originates. The genus contains one species, Chilenchus elegans (Raski & Geraert, 1986) (syn. Lelenchus elegans Raski & Geraert, 1986). the type species was collected from moist soil under thick tundra at Orange Bay, Hardy Peninsula, Hoste Island, Chile.