Foreign Affairs Minister John Baird, who is also the minister responsible for the National Capital Commission, made the announcement Wednesday close to the parkway near the Deschênes Rapids.
The road stretches west to east and weaves along the Ottawa River shoreline from Carling Avenue to Booth Street, where it turns into Wellington Street.
Two years ago Ottawa historian Bob Plamondon had pushed for the City of Ottawa to change the name of Wellington, where the Parliament Buildings are located — to Sir John A. Macdonald Boulevard.
Wellington is named for the Duke of Wellington, the British statesman who pushed for the creation of the Rideau Canal.
The road is the second major piece of public property to be renamed after Macdonald this year.
On January 11, the former Bank of Montreal building was renamed at 144 Wellington the Sir John A. Macdonald Building.