Arthur Graeme Slaght (3 May 1877 – 21 January 1964) was a Liberal party member of the Canadian House of Commons. He was born in Simcoe, Ontario and became a barrister and solicitor by career.Slaght attended secondary school at Simcoe, then studied at Osgoode Hall Law School.He unsuccessfully attempted to win a seat in the House of Commons at Timiskaming riding in a by-election on 7 April 1920. He won the Parry Sound seat in the 1935 federal election and was re-elected there in 1940.