While claims of US State Quarters being consistently worth “millions of dollars” are generally associated with extreme hype and rare, unconfirmed claims on social media, there are several rare error and high-grade State Quarters that have sold for significant, five-figure amounts at auction, making them the most valuable in the series.
Here is a list of some of the most valuable State Quarters based on verifiable high auction results and estimated top values, mostly due to rare minting errors or exceptional, near-perfect condition:
Key State Quarter Errors to Look For:
- Experimental Planchets (1999 P Delaware, Connecticut, and Pennsylvania): These quarters were struck on a special brass alloy intended for the Sacagawea dollar, giving them a golden sheen, a smooth edge instead of reeded, and an increased weight.
- 2004-D Wisconsin Extra Leaf Quarters: This is a famous error where an extra leaf appears near the ear of corn, with two distinct varieties: “High Leaf” and “Low Leaf”.
- Grease Strike-Through Errors (e.g., 2004-P Texas): This occurs when grease on the die prevents the complete design from striking the coin, sometimes leaving parts of the design weak or missing.
- Doubled Die Errors (e.g., 2005-P Minnesota): These errors show a noticeable doubling on elements like the trees in the design.
