10 Most Valuable State Quarter Coins
State quarters collection can be quite enjoyable and rewarding; it’s an opportunity to appreciate coins whose worth is way above their face value. The circulating quarters of the majority don’t have any higher value. In contrast, other state quarters hold a great potential for high-value due to being rare, possessing minting errors, or holding exceptional conditions.
Here is some guide about some of the most valuable state quarters and what makes them desirable by collectors.
1999-P Experimental Delaware State Quarter
1999, the U.S. Mint experimented with different alloys for the Sacagawea dollar by using quarters from Delaware and other states. These experimental planchets were struck in extremely low numbers, making them very rare.

This graded Delaware MS66 experimental alloy quarter sold at auction for an astonishing $4,888. This coin is one of the most valuable from the Statehood Quarters program.
2003-D Maine State Quarter
The Maine state quarter was released in 2003 and is generally seen in circulation but very rare in higher grades. Coins of MS67 graded or better are extremely hard to locate.
In 2017, a nearly perfect MS68 Maine quarter sold at auction for $2,300. That gave emphasis on the premium value of decent examples.
2000-P South Carolina State Quarter
The 2000 South Carolina quarter is also one of the near-rarities, especially the mint-state version. High-grade examples for the MS68 and MS69 are extremely rare.
In 2018, an MS69 South Carolina quarter sold for a whopping $8,000, showing just how much collectors want it.
2004-D Wisconsin State Quarter
The 2004 Wisconsin quarter is known for its minting error: an extra leaf on the corn husk, which comes in two forms: “Low Leaf” and “High Leaf.”
A 2004-D Wisconsin quarter graded MS67 with the Low Leaf error sold at auction in 2020 for $6,000, proving that error coins are worth something.
1999-P Connecticut State Quarter
Connecticut’s 1999 quarter is another experimental Sacagawea planchet coin, which can be identified by its gold color, thicker composition, and smooth edge. These planchet errors are rare and highly collectible.
In 2018, a Connecticut quarter graded MS69 sold for $10,500, making it one of the most expensive state quarters ever sold.
1999-P Delaware State Quarter
Being the first coin from the Statehood Quarters series, the Delaware quarter is historically important. Mint-state examples are highly prized and a 2008 sale of an MS66 brought in $4,888.
1999-P Pennsylvania MS67 Experimental Planchet
Pennsylvania’s 1999 quarter was produced on experimental planchets. These coins are so rare that a collector just loves to get them.
According to the Numismatic Guaranty Company, an example graded at MS67 would be worth around $2,520.
2006-D North Dakota State Quarter
This state quarter is circulated but not common in higher grades of MS67 and above.

The MS68 North Dakota was sold in 2017 for $3,760 because it’s a rare coin in top grade.
2004-P Texas State Quarter
This is the state quarter that was introduced in 2004 and known for having the “Grease Strike Through Error.” This results in missing design details due to grease on the coin die.
A flawless MS69 Texas quarter brought $10,000. Mint-state examples are worth thousands even if they are error-free.
2008-D New Mexico State Quarter
The New Mexico quarter minted in Denver is scarcer than the Philadelphia-minted version, with sharper features and a better finish.
At MS67 or higher, these coins are extremely rare. Their rarity and high quality make them valuable to collectors.
FAQS:
Why are some state quarters valuable?
Rarity, mint errors, and high-grade conditions add value.
What is an experimental planchet?
A test alloy used to coin the Sacagawea dollar.
Which state quarter has the most errors?
The 2004 Wisconsin quarter with the Extra Leaf error.
How do I know if a coin is a minting error?
Look for irregularities such as extra details or missing designs.
Are circulated state quarters worth anything?
Most are worth face value unless they have unique features.