1990/91 South Australian Individual Speedway Championship

The 1990/91 South Australian Individual Speedway Championship was the 45th running of the South Australian Individual Speedway Championship organised by the Speedway Riders Association of South Australia and sanctioned by Motorcycling Australia. The final took place on 29 December 1990 at the 300 metres (330 yd) long Riverview Speedway in Murray Bridge.

1990/91 South Australian Individual Speedway Championship

The 1990/91 South Australian Individual Speedway Championship was the 45th running of the South Australian Individual Speedway Championship organised by the Speedway Riders Association of South Australia and sanctioned by Motorcycling Australia. The final took place on 29 December 1990 at the 300 metres (330 yd) long Riverview Speedway in Murray Bridge.