Toronto is a port city located on the northwest shore of Lake Ontario in Canada. It has seven letters and is one of the Great Lakes ports. Erie is a port city located on the south shore of Lake Erie in Pennsylvania. It has four letters and is also one of the Great Lakes ports. Duluth is a port city located on the north shore of Lake Superior in Minnesota. It has six letters and is another of the Great Lakes ports. Toledo is a port city located on the western end of Lake Erie in Ohio. It has six letters and is yet another of the Great Lakes ports. Duluth-Minnesota is a port city located on the north shore of Lake Superior in Minnesota. It has fifteen letters and is the last of the Great Lakes ports.