Kettwig is the southernmost borough of the city of Essen in western Germany and, until 1975, was a town in its own right. Kettwig is situated next to the Ruhr river, at a median height of 53 metres above sea level. It is the most recently incorporated borough of Essen and also the largest in size, at 15.3 km². It belongs to the city district Stadtbezirk IX Werden/Kettwig/Bredeney and has 17,760 inhabitants as of June 2006.