The Ngwavuma is a river in Eswatini and KwaZulu-Natal Province in southern Africa. It is also known as the Inguavuma, Ingwavuma, Ingwovuma, and Nggwavuma, and is one of the five major rivers in Eswatini. It arises in southwestern Eswatini and flows eastward. It is a tributary of the Pongola River.