 Then on 23 November 1910, the northern part of Red Lake was sectioned off to create Pennington County, the penultimate Minnesota county to be created (followed by Lake of the Woods in 1922).The county was named for Edmund Pennington (1848-1926), a longtime Minnesota railroad executive, who was serving as president of the Minneapolis, St. Paul, and Sault Ste.Marie Railway when the county was formed.