How many U.S. States have you been to? A layover at an airport doesn't count, but driving or riding a train through does. How many states make up the United States of America? A: There are 50 states in the United States of America. This number excludes the federal district of. The United States of America commonly known as the United States (U.S.) or America, is a . Natives taught many settlers where, when and how to cultivate corn, beans and squash. European missionaries and others felt it was important to U.S. state · Territories of the United States · Federal republic · Constitution.