City of Johannesburg elections

The City of Johannesburg Metropolitan Municipality council consists of 270 city councilors elected by mixed-member proportional representation. The councillors are divided into two kinds: (a) 135 Ward councillors who have been elected by first-past-the-post voting in 135 wards; and (b) 135 councillors elected from party lists (so that the total number of party representatives is proportional to the number of votes received).

Source: Wikipedia — City of Johannesburg elections (CC BY-SA 4.0)