McLean Mill National Historic Site of Canada is a former sawmill and logging operation located on 13 hectares of forested land in the Alberni Valley of Vancouver Island. The formal recognition consists of some 35 structures and the land surrounding them. Built resources include an operational steam operated sawmill, and ancillary structures including a wide variety of wooden garages, storage structures and outbuildings, a cluster of wooden residences and administrative buildings, and a rail line. Landscape features include outdoor areas for processing and storage of lumber, and a mill pond.

Historically, the McLean Mill Historic Site has served as the destination point for the Alberni Pacific Railway (APR), an organization that has operated three different locomotives, including the favourite No.7 Baldwin Steam Locomotive built in 1929.