The unknown woman was found by locals on Saturday, with her face mutilated beyond recognition, a resident said.
The discovery comes almost a week after Clanwilliam teacher Allison Plaatjies was found dead in her flat.
Police spokesperson Andrè Traut said: “On Saturday at about 2:50pm the body of an unknown female with stab wounds was discovered at a dumping site in Genadendal. The circumstances into her death are being investigated.”
Traut said no arrests had yet been made.