Timeline of US Presidents By SAvery445 Period: Apr 30, 1789 to Mar 4, 1797 1. George Washington George Washington was the first President of the United States. He served from April 30, 1789 until March 4, 1797 Period: Mar 4, 1797 to Mar 4, 1801 2. John Adams John Adams was the second President of the United States. Period: Mar 4, 1801 to Mar 4, 1809 3. Thomas Jefferson