The Duncan Canal is a naturally occurring inland waterway in the Alexander Archipelago in Alaska, United States.
It was first charted in 1793 by James Johnstone, one of George Vancouver's officers during his 1791-95 expedition.
The Duncan Canal Portage is a popular hiking trail across the northern end of the Lindenberg Peninsula.
It originally provided access to the northern end of the Duncan Canal directly from Frederick Sound.
This article about a location in the Petersburg Borough, Alaska is a stub.