The United States Half Dollar Coin has been in circulation since 1794. It is the oldest coin still in circulation in the United States. The Half Dollar Coin has gone through many design changes over the years, but the most iconic design is the Kennedy Half Dollar. This design was introduced in 1964 and features a portrait of President John F. Kennedy on the obverse side. The reverse side features a modified version of the Great Seal of the United States. The Half Dollar Coin is made of a copper-nickel alloy and is composed of 91.67% copper and 8.33% nickel. The coin has a diameter of 30.61 mm and a thickness of 2.15 mm. The weight of the coin is 11.34 grams. The value of the Half Dollar Coin depends on its condition and the year it was minted. Coins minted before 1964 are made of 90% silver and are worth more than coins minted after 1964. Coins in good condition can be worth anywhere from $2 to $50. The Half Dollar Coin is an iconic piece of American history. It is a reminder of the United States’ long and storied history and is a great addition to any coin collection.