Finniss is an electoral district of the House of Assembly in the Australian state of South Australia. It is named after B. T. Finniss, the first Premier of South Australia. It covers a 5,875 km² regional area which includes Kangaroo Island, the Fleurieu Peninsula, and the towns of Kingscote, Middleton, Mount Compass, Penneshaw, Port Elliot, Sellicks Beach, Victor Harbor and Yankalilla.
The House of Assembly has a electoral district that is named after a person that was important in the history of South Australia.