The Corporate Town of Jamestown was a local government area in South Australia, centred on the town of Jamestown. It was proclaimed on 25 July 1878, severing the seven-year old settlement of Jamestown from the surrounding District Council of Belalie. The first mayor was John Cockburn, later Premier of South Australia, with George Hingston Lake as town clerk. Under the new council, it instituted a tree-planting program from 1879, reportedly the first town in rural South Australia to do so.