The Commissionaires Long Service Medal is a Canadian service medal for members of the Canadian Corps of Commissionaires.

The medal honours 12 years of exemplary service by members of the Canadian Corps of Commissionaires.

There is no Post Nominal entitlement accompanying receipt of the medal.

This medal was first approved by the Secretary of State on 20 August 1948 although a slightly different form.

An Order in Council of 26 February 1998 officially incorporated it into the Canadian Honours system.