The 2004-S Iowa State Quarter is worth anywhere from $6 in typical Proof condition to over $900 for rare Silver Deep Cameo specimens in perfect grades. Whether you found one in a collection or are just curious about that shiny coin in your hand, its value depends heavily on the metal content and the strike quality.

How to Identify Your 2004-S Iowa Quarter Today

If you have found a quarter with the “S” mint mark under the “In God We Trust” motto, you are looking at a coin produced specifically for collectors at the San Francisco Mint. Unlike the common quarters you spend at the grocery store, these were never intended for circulation. They were sold in official United States Mint sets, which means they usually retain a high level of detail and a mirror-like finish. To get an instant valuation of your specific find, you can use a top coin identifier app to see high-resolution comparisons of your coin’s condition.

The Iowa quarter features a beautiful design inspired by Grant Wood’s painting “Arbor Day,” showing a schoolhouse and people planting a tree. While millions were made for the general public in Philadelphia and Denver, the “S” versions are much more limited. When you use the CoinHix app, you can quickly distinguish between the common copper-nickel clad version and the more valuable silver version. Checking the edge of the coin is the first step: if you see a solid silver stripe, you might have a 90% silver coin; if you see a copper stripe, it is a standard clad proof.

Clad vs Silver Proof Iowa Quarters

The 2004-S Iowa quarters come in two distinct varieties that dictate their market price. The first is the Clad Proof, made of the same copper-nickel composition as pocket change but struck with specially polished dies. These generally sell for a few dollars. The second, and more desirable version, is the 90% Silver Proof. These were sold in special “Silver Proof Sets” and contain actual precious metal.

Because the silver version contains 0.1808 troy ounces of pure silver, its value fluctuates with the daily price of bullion. However, the numismatic value or the “collector’s premium” often pushes the price higher than the silver melt value. Professional collectors often look for the current market trends for 2004 quarters to decide when to buy or sell. If your coin is still in its original plastic lens from the US Mint, it will likely command a higher price than a loose coin that has been handled with bare fingers.

Understanding the Price of 2004-S Iowa Quarters

The value of these coins is relatively stable, but high-grade examples can surprise you at auction. Using a tool like CoinHix allows you to stay updated on what these coins are actually selling for on platforms like eBay or Heritage Auctions. Most everyday Americans will find that their clad proof is worth about $5 to $7, while a silver proof often clears the $15 mark quite easily.

Coin Variety	Grade / Condition	Estimated Value
2004-S Iowa Clad Proof	PR65 (Average)	$5.00 – $8.00
2004-S Iowa Clad Proof	PR70 (Perfect)	$25.00 – $40.00
2004-S Iowa Silver Proof	PR67 (High Grade)	$15.00 – $22.00
2004-S Iowa Silver Proof	PR70 (Gem Quality)	$50.00 – $90.00

What Makes a 2004-S Quarter Valuable

The most important factor in determining your coin’s worth is “eye appeal.” Collectors look for the “Deep Cameo” or “Ultra Cameo” effect. This is where the background of the coin (the fields) is a dark mirror, and the raised parts (the device) are a frosty white. This contrast is what makes proof coins look so stunning. If your coin has scratches, fingerprints, or looks “cloudy,” it loses a significant portion of its value.

Beyond condition, rarity in high grades is the real driver for high prices. For example, the 2004 state quarters value and price statistics show that while millions were made, only a fraction are “Perfect 70s.” If you have a coin that looks flawless under a magnifying glass, it might be worth sending to a professional grading service like PCGS or NGC. A certified PR70 Silver Iowa Quarter can sell for nearly $100, which is a massive increase over its face value of 25 cents.

Checking for Rare Errors and Variations

While the 2004-S Iowa quarters are mostly known for their proof quality, collectors always keep an eye out for errors. Doubled dies, where the lettering or images appear to have a slight shadow or “double” look, are the most sought-after. Even though the San Francisco Mint has very high quality control, mistakes occasionally happen.

If you suspect your coin is unique, CoinHix can help you compare it against known error lists. Most people who find a 2004-S Iowa quarter in the wild are actually finding a “broken” proof set—meaning someone took the coin out of its protective case and spent it. These “Proof-in-Circulation” coins are usually only worth their face value or a small premium for silver content, but they are still a cool piece of history to find in your change.

Frequently Asked Questions

Q: How can I tell if my 2004-S Iowa quarter is silver or clad?
A: Look at the edge of the coin. If you see a orange/copper stripe, it is a clad coin. If the edge is solid silver-colored with no copper visible, it is likely the 90% silver version. You can also weigh them; the silver version weighs 6.25 grams, while the clad weighs 5.67 grams.

Q: Is a 2004-S quarter rare?
A: While they were not made for circulation, nearly 3 million clad proofs and 1.7 million silver proofs were made. They are not considered “rare” in the world of numismatics, but they are much harder to find than regular P or D mint mark quarters.

Q: Can I spend a 2004-S Iowa quarter at a store?
A: Yes, it is legal tender worth 25 cents. However, because even the cheapest version is worth about $5 to a collector, it is highly recommended that you keep it or sell it rather than spending it.

Q: Where is the mint mark on the 2004 Iowa quarter?
A: The “S” mint mark is located on the “heads” (obverse) side of the coin, to the right of George Washington’s ponytail and just below the words “In God We Trust.”