Ebenezer St Mark Ntlali (born 1954 in Richmond, Northern Cape) is a South African Anglican retired bishop. He was the fourteenth Bishop of Grahamstown.
He trained for the priesthood at St Bede's College, Transkei, and has a bachelor's degree in church history and systematic theology from Rhodes University. He was archdeacon of King William's Town until his consecration as a bishop in 2007.
On 30 July 2023, he retired as the bishop of Grahamstown.