The diocese is the area between the Vaal Triangle--where Sharpeville, Vereeniging, Boipatong, Vanderbijlpark and Sebokeng are found--and the southern side of the city of Johannesburg in South Africa. The diocese is small in size, being only 80km long and half that wide, but rapid urbanisation has resulted in significant growth in parishes. Just over half of these churches have a recognisable church building in which to worship. The rest meet in garages, shacks or the open air. One of the latest new congregations worships in French and aims to welcome refugees from the Congo and other Francophone African countries.