Half dollar (United States coin)

The half dollar, sometimes referred to as the 50-cent coin, is a United States coin worth 50 cents, or 1⁄2 of a dollar ($0.50). In both size and weight, it is the largest circulating coin currently minted in the United States, being 1.205 inches (30.61 millimeters) in diameter and 0.085 in (2.16 mm) in thickness, and is twice the weight of the quarter. The coin's design has undergone a number of changes throughout its history. Since 1964, the half dollar depicts the profile of President John F. Kennedy on the obverse and the seal of the president of the United States on the reverse.

Although seldom used today, half-dollar coins were common in circulation until the 1970s and were regularly used alongside other denominations of US coinage. Half-dollars have since become uncommon in circulation for several reasons. The coins were produced in fairly large quantities until 2002, when the U.S. Mint reduced production of the half and ceased minting them for general circulation. As a result of its decreasing usage, many pre-2002 half dollars remain in Federal Reserve vaults, prompting the change in production.

Collector half dollars are still minted and sold by the U.S. Mint, and circulated half dollars minted from 1971 to 2001 can be found at American banks and . Beginning in 2021, half dollars were again produced for general circulation. Modern half dollars are composed of cupro-nickel, but they contained 40% silver from 1965–1970, and coins minted in 1964 contained 90% silver and 10% copper.