The United States one-cent coin, commonly called a penny, is a unit of currency equaling 1⁄100 of a United States dollar. Its obverse has featured the profile of President Abraham Lincoln since 1909. Since 1959, the reverse has featured the Lincoln Memorial.

The coin has gone through several designs over its two-hundred year history. Until 1857 it was about the size of the current half-dollar coin. In 2009 the cent will get a one-year, four-coin commemorative program marking the 100th anniversary of Lincoln being placed on the cent.