Hello there! That's a great question about a very popular and historic coin. The 1964-D Kennedy half dollar holds a special place for many collectors.
The value of your 1964-D half dollar depends on two main things: its silver content and its condition. All Kennedy half dollars made in 1964 are composed of 90% silver, which gives them a base value tied to the current price of silver. This is often called its "melt value." Because the silver market fluctuates daily, this value changes, but you can typically expect it to be worth many times its 50-cent face value, often in the range of $10 or more just for its silver.
The "D" on your coin indicates it was minted in Denver. For a common, circulated coin from 1964, the mint mark doesn't drastically change its worth from one minted in Philadelphia (which has no mint mark for that year).
Where the value can really increase is with the coin's condition. If your coin is in average circulated condition, its value will be very close to its silver melt value. However, if it's an uncirculated coin that looks brand new with no signs of wear, its value to a collector could be higher, perhaps in the $15 to $25 range. For exceptionally well-preserved examples that have been professionally graded, the price can climb much higher.
While the provided search results point to reputable coin pricing guides like Greysheet and NGC, they didn't include the specific price charts. The values mentioned here are based on general market information. For the most current price, it's always a good idea to check the live price of silver or consult a recent coin pricing guide.
