This list is of the Historic Sites of Japan located within the Prefecture of Saga.
As of 1 August 2019, twenty-five Sites have been designated as being of national significance (including three *Special Historic Sites); Kii Castle spans the prefectural borders with Fukuoka.
As of 1 August 2019, forty-seven Sites have been designated as being of prefectural importance.
As of 1 May 2018, a further eighty-one Sites have been designated as being of municipal importance.