Who was the first president of the United States?

The first president of the United States was George Washington, who took office in April 1789. He was unanimously elected by the Electoral College, reflecting his widespread popularity and leadership during the American Revolutionary War. Washington's presidency established many protocols and traditions that continue in the executive branch today. His two terms set important precedents, including the formation of a cabinet and the voluntary decision to step down after two terms, fostering the principle of peaceful transition of power. This foundational role in American history highlights his significance not just as a leader, but as a symbol of American independence and democratic governance.

The other figures mentioned played crucial roles in American history, with Thomas Jefferson serving as the third president, John Adams as the second, and James Madison as the fourth. However, none of them were the first to hold the presidency, making George Washington the clear correct answer.