Minnesota is a big state, so it makes sense that the longest road in the Land of 10,000 Lakes is also pretty big. But do you know which one is the longest?. When it comes to states, our own North Star State is one of the biggest in the country. We’re no Texas or Alaska, mind you, but Minnesota’s nearly 90,000 square miles (89,943 to be precise) ranks us as the 12-largest state in the U.S.