 The County of Adelaide, for instance, has a larger population than all the other counties in South Australia combined.Another reason is that many of the counties' borders follow rivers, having been proclaimed before settlements developed, which means that towns which typically grow up on rivers often find themselves in more than one county.Wangaratta, for instance, is located at the junction of the Ovens and King rivers, and is thus in three counties; Moira, Delatite and Bogong.