Who was sworn in as the first president of the United States in 1789?

George Washington was sworn in as the first president of the United States in 1789.

Washington took the oath of office on April 30, 1789, at Federal Hall in New York City. Chancellor Robert Livingston administered the oath before a crowd gathered outside the building. The ceremony followed the ratification of the Constitution and marked the beginning of the new federal government.

Washington had commanded the Continental Army during the Revolutionary War and presided over the Constitutional Convention in 1787. His reputation for military leadership and public service helped him win unanimous electoral support from the presidential electors under the original constitutional system.

John Adams became the first vice president and succeeded Washington in 1797. Washington served two four-year terms and declined to seek a third, establishing a precedent later followed by presidents until the Twenty-Second Amendment limited presidents to two elected terms.