Driving from Sandusky to Dayton, Ohio

The Great Lakes Megalopolis consists of the group of metropolitan areas in North America largely in the Great Lakes region and along the Saint Lawrence Seaway. It extends from the Midwestern United States in the south and west to western Pennsylvania and Upstate New York in the east and northward through Southern Ontario into southwestern Quebec in Canada. It is the most populated and largest megalopolis in North America. At its most inclusive, in the United States the region cuts a wide swath from the Twin Cities in Minnesota to Rochester, New York, while on the Canadian side, it extends northeast to Quebec City. Further south, the region is commonly considered to include Cincinnati, Indianapolis, and Columbus, Ohio. Within the broad region, there is a core area that includes Chicago, Milwaukee, Grand Rapids, Detroit, Cleveland, Pittsburgh, Buffalo, Rochester, and Windsor to Toronto. The total region, extending from Minneapolis to Chicago to Quebec City had an estimated population of 59,144,461 as of 2011, making it the most populous megalopolis on the continent. It is projected to reach a population of approximately 65 million by 2025.