Alexandra, informally abbreviated to Alex, is a township located in the Gauteng province of South Africa. It forms part of the city of Johannesburg and is located near the upper-class suburb of Sandton. Alexandra is bounded by Wynberg on the west, Marlboro and Kelvin on the north, Kew, Lombardy West and Lombardy East on the south. It is commonly known as "Gomorrah" among local residents. Alexandra is one of the poorest urban areas in the country. Alexandra is situated on the banks of the Jukskei River. In addition to its original, reasonably well-built houses, it also has a large number (estimated at more than 20,000) of informal dwellings or "shacks".