Who is the first president of usa?
The first president of the US was George Washington (one of the Founding Fathers): he was the president between 1789-1797. He was elected unanimously (with all votes) in 1789 - up until today it has never happened again that a president received all votes during the election.
Washington was the first president under the constitution. Before him was John Handock, who was President of the Continental Congress, when the Declaration of Independence was written.