Ogden Dunes is a town in Portage Township, Porter County, Indiana, United States. It is located on the shore of Lake Michigan, within the Indiana Dunes National Lakeshore and nearly surrounded by the city of Portage. The population was 1,110 at the 2010 census. It is named for multi-millionaire Francis A. Ogden, who owned the land there before his death in 1914. His main interest in the land where the dunes are was the sand which could be scooped up and sold, with more sand being replenished naturally over time.