State elections were held in South Australia on 11 October 1997. All 47 seats in the South Australian House of Assembly were up for election. The incumbent Liberal Party of Australia led by Premier of South Australia John Olsen defeated the Australian Labor Party led by Leader of the Opposition Mike Rann, forming a minority government with the SA Nationals and independent MPs.

The House of Assembly, or lower house; Is one of the two chambers of the Parliament of South Australia. The other is the Legislative Council. It sits in Parliament House in the state capital, Adelaide.