Campylite is a mineral which received the name from the Greek 'kampylos'- bent, on account of the barrel-shaped bend of its crystals. It is composed of pyromorphite and mimetite (chloro-arsenate of lead), and usually occues in association with them.

It occurs in the upper lead deposits through the oxidisation of galena or cerussite. The main deposits are Pribam in Bohemia and Dry Gill , Caldbeck , near Wigton, Cumbria, England. Campylite is a relatively rare mineral.