According to the United States Census Bureau, the city has a total area of 87.43 square miles (226.44 km2); 67.79 square miles (175.58 km2) is land and 19.64 square miles (50.87 km2) is water. It is Minnesota's second-largest city by land area, surpassed only by Hibbing. Of its 87.3 square miles (226 km2), 68 square miles (180 km2), or 77.89%, is land and 19.3 square miles (50 km2), or 22.11%, is water. Duluth's canal connects Lake Superior to the Duluth–Superior harbor and the Saint Louis River. It is spanned by the Aerial Lift Bridge, which connects Canal Park with Minnesota Point ("Park Poi...
Source: Wikipedia (as of 04/11/2019). Read more from Wikipedia