Alfred Joseph "Alf" Stong (August 2, 1940 – ) is an Ontario lawyer, judge and former political figure. He represented York Centre in the Legislative Assembly of Ontario as a Liberal member from 1975 to 1981.
He was born in Richmond Hill, Ontario, the son of Alfred David Stong, and educated at the University of Toronto and Osgoode Hall. In 1965, he married Raymonde Marie Aubrey. Stong served as a lieutenant in the Canadian Forces. He was defeated by Don Cousens for the provincial seat in 1981. Stong is currently serving as a judge in the Ontario Superior Court of Justice.