How many countries are there in the US of America?
There are fifthty one countries in The United States Of America.
There are 50 states in the United States and the Philippines is a U.S. territory.
In probably when the DI (Declaration of Independence) was signed it was the United States of America, so US is short for United States of America or it can be called USA. Another answer: Because US is short for USA, which stands for United States of America. Besides, there are many other countries in America. America was originally the name for the entire Western Hemisphere