How much a 1964 d quarter worth?

The value of a 1964-D quarter, which is a standard 25-cent coin, typically ranges from about $5 to $10 in circulated condition. If the coin is in uncirculated or proof condition, its value can increase significantly, potentially reaching $20 or more. Factors such as minting errors, overall demand, and condition can also affect its worth. For an accurate valuation, it's best to consult a coin dealer or reference a current numismatic price guide.