The County of Polwarth is one of the 37 counties of Victoria which are part of the cadastral divisions of Australia, used for land titles. The County is in the Western District of Victoria and includes the Cape Otway area, bounded by the Gellibrand River in the west and the Anglesea River and Barwon River in the east, in the north by a line from Winchelsea, through Colac to Larpent, and by Bass Strait to the south. The largest town is Colac.