Nelson Ludington (January 18, 1818 – January 15, 1883) was a nineteenth-century American businessman, lumber baron and banker. Born in Ludingtonville, New York, he made his fortune in the Midwest based on resource exploitation: lumber, iron ore and copper.
He bought large tracts of timber land on the Upper Peninsula of Michigan, where he was associated with the founding of the city of Escanaba. He also had a branch and the main lumber yards in Milwaukee, Wisconsin, but eventually based his namesake company in Chicago, Illinois, which became the boom town of the upper Midwest. There he helped found and served as president of the Fifth National Bank of Chicago.