|The Duluth Harbor North Pier Light is significant on the local level in St. Louis County, Minnesota, and is eligible for inclusion in the National Register under Criteria A and C. It is significant under Criterion A for its association with Federal efforts to provide for an integrated system of navigational aids throughout the United States. This property also qualifies for National Register listing under Criterion C because it embodies and exemplifies distinctive architectural design and engineering aspects of early twentieth century lighthouses built on Great Lakes harbor entry piers and breakwaters. The Duluth Harbor North Pier Light's period of historical significance begins in 1910 when it was established as a Federal aid to navigation and ends in 1966, its most recent year of operation 50 years before the present. This property retains integrity in terms of location, setting, design, materials, workmanship, association, and feeling. It is a well-known and widely recognized landmark in St. Louis County.