Potchefstroom (Afrikaans pronunciation: [pɔtʃɛfstruəm], colloquially Potch) is an academic city in the North West Province of South Africa. It hosts the Potchefstroom Campus of the North-West University. Potchefstroom is on the Mooi Rivier (Afrikaans for "pretty river"), roughly 120 km (75 mi) west-southwest of Johannesburg and 45 km (28 mi) east-northeast of Klerksdorp. Potchefstroom, together with Rustenburg, is the second-largest city in the North West Province. The largest city, Klerksdorp, is about 45 kilometres (28 mi) away.