Hello there! That's a great question about a popular coin. The value of a 1966 U.S. half dollar depends heavily on its condition, but it's always worth more than its 50-cent face value because of its silver content.
The 1966 Kennedy half dollar is part of a series of coins (from 1965 to 1970) that were made of 40% silver. Because of this, the coin has a base "melt value" that is tied to the current market price of silver. This value typically amounts to a few dollars, making any 1966 half dollar you find a nice little treasure.
Beyond its silver content, the coin can have a higher numismatic, or collector, value. This is where its condition really matters. The provided search results from Greysheet and NGC Coin are excellent examples of professional coin grading and pricing services that dealers and serious collectors use. They track the value of coins based on their state of preservation.
A common, circulated 1966 half dollar with visible wear will usually be worth its silver melt value. However, a coin that is in pristine, uncirculated condition, often called Mint State (MS), will be worth more to a collector. For these top-grade coins, the value can increase significantly, though the 1966 half dollar is quite common and not considered a rare date. To get a specific value, you would look at price guides on sites like the ones in the search results and compare your coin to the different grades listed.
