Belfast is a small town in Mpumalanga Province, South Africa that is renowed for its excellent trout fishing conditions. Sheep and dairy farming take place here as well as maize, potatoes and timber are produced. Coal and a black granite are mined around Belfast.

It was named after Irishman Richard O'Neill from Belfast in Ireland who owned the farm on which the town was built. The British built a concentration camp here during the Boer War to house Boer women and children.