Bryce Stuart Mackasey PC (August 25, 1921 – September 5, 1999) was a Canadian politician and diplomat.
Born in Quebec City, Quebec, Mackasey was elected as a Liberal candidate in the riding of Verdun in the 1962 federal election.
He resigned in 1978 to run in a federal by-election in the riding of Ottawa Centre, but was defeated.
Mackasey held numerous ministerial positions including Labour, Manpower and Immigration, Secretary of State, Postmaster General of Canada and Consumer and Corporate Affairs.
When Mackasey left office in 1984 Prime Minister John Turner appointed him Ambassador to Portugal; this led to Conservative leader Brian Mulroney's famous comment about patronage, "There's no whore like an old whore".