A half dollar is a coin in the United States that is worth 50 cents, which is half of a dollar. It is larger than a quarter and is made primarily of copper and nickel. The coin features different designs, with the most common being the John F. Kennedy half dollar, introduced in 1964 to honor the late president. Half dollars are used in everyday transactions, but they are less common in circulation compared to smaller coins. They are often collected by numismatists and can be found in various conditions, affecting their value among collectors.