The Detroit -- Windsor region is an international transborder agglomeration comprising the American city of Detroit, Michigan, the Canadian city of Windsor, Ontario, and the Detroit River between them. The Detroit -- Windsor area acts as a critical commercial link straddling the Canada -- United States border and has a total population of about 5,700,000. It is North America 's largest cross-border conurbation.
which part of canada is closest to detroit
Windsor, Ontario