George Washington was instrumental in America winning the Revolutionary War. The first elected U.S. president, his face has been on the $1 bill since 1869.
The $1 bill is one of the least counterfeited notes. The Federal Reserve revised the bill in 1963, and it is the only bill prohibited by law from being redesigned.
Known as the "Father of the Declaration of Independence," Thomas Jefferson is on the $2 bill. He became the third U.S. president in 1801 and won reelection in 1804.
$2 bills are regarded as evil or associated with nefarious deeds. The Department of the Treasury stopped printing them from 1966 to 1976, and now only prints them periodically.
Presiding over the country during the Civil War, Abraham Lincoln saved the Union from complete collapse, and beginning in 1914 his image was used on the $5 bill.
The bill was revised in 1929, 1993, 2000, and 2008. The 1914-series $5 bill had Christopher Columbus and the Pilgrims on the back, but since 1929 the back has the Lincoln Memorial.
In 1929, the Treasury put Alexander Hamilton on the new $10 bill, where he has remained ever since. Hamilton is one of two non-presidents to be on an American bill.
Hamilton had a profound impact on the founding of America. He was a veteran of the Revolutionary War, a Founding Father, a Federalist, and the first secretary of the U.S. Treasury.
In 1929, the Treasury put Andrew Jackson on the $20 bill, where he still is today. However, his image on the bill has been controversial due to his racist policies.
The face of the $20 bill will change in 2030 due to Treasury secretary Jacob J. Lew who decided to replace him with abolitionist and civil rights figure Harriet Tubman.