Who was the President of the United States in 1804?

Thomas Jefferson was the President of the United States in 1807.

Thomas Jefferson was the 3rd President of the United States from 1801 March 4 to 1809 March 4, serving 2 terms. He was previously the 2nd Vice-President of the United States from 1797 March 4 to 1801 March 4 under John Adams.