The 1991-S Washington Quarter is worth anywhere from $3 in lightly circulated condition to over $10 or more in perfect proof grades — and if you’ve got a Deep Cameo specimen, you might be looking at even higher numbers. Most people come across these coins in old coin sets or collections, and the good news is they’re genuinely interesting pieces with a real collector following.
If you’re not sure what you’re holding, a free coin identifier app can help you figure out the mint mark, grade, and approximate value in seconds. Tools like CoinKnow make this process simple for everyday collectors and beginners alike — just snap a photo and get real-time results.
What Is the 1991-S Washington Quarter?
The 1991-S Washington Quarter was struck at the San Francisco Mint and released exclusively as part of proof sets — meaning it was never intended for everyday pocket change. The “S” mint mark, located on the obverse just below Washington’s portrait, is the key identifier for this coin.
These quarters were produced with a polished die and specially treated planchets, giving them that brilliant mirror-like finish collectors love. Unlike coins from the Philadelphia or Denver mints that year, the 1991-S was made purely for collectors.
The U.S. Mint struck approximately 2.8 million of these proof coins in 1991, which is a relatively modest mintage compared to business strike quarters. That lower production number contributes to its sustained collector interest, even though it’s not considered a rare coin by strict standards.
1991-S Washington Quarter Value by Grade
Grade is everything when it comes to coin value, and the 1991-S is no exception. Because it’s a proof coin, grading systems like the Sheldon scale rate these from PR60 at the low end to PR70 (perfect) at the top.
| Grade | Description | Estimated Value |
|---|---|---|
| PR60 | Proof, noticeable blemishes | $3 – $5 |
| PR65 | Gem Proof, minor flaws | $5 – $7 |
| PR67 | Superb Gem Proof | $7 – $10 |
| PR69 DCAM | Deep Cameo, near perfect | $10 – $18 |
| PR70 DCAM | Perfect Deep Cameo | $20+ |
For a more detailed look at current 1991 Washington Quarter price trends across grades and auction records, it’s worth checking dedicated numismatic databases that track live sales data.
Cameo vs. Deep Cameo — Does It Really Matter?
Yes, it matters quite a bit. Proof coins from the San Francisco Mint often come in two varieties: regular Cameo (CAM) and Deep Cameo (DCAM). The difference is in the contrast between the frosted design elements and the mirror-like fields.
Deep Cameo coins show a sharp, dramatic contrast that’s immediately eye-catching. Grading services like PCGS and NGC designate these separately, and DCAM coins consistently sell for more than their standard Cameo counterparts.
If your 1991-S quarter shows strong frosting on Washington’s portrait and the eagle on the reverse, you likely have a Cameo or DCAM example. Getting it professionally graded can make a real difference in resale value — sometimes doubling the price over an ungraded coin.
How to Find Out What Your 1991-S Quarter Is Really Worth
The best way to determine your coin’s value is to check recent auction results and compare your coin’s condition carefully. Coins that have been cleaned, improperly stored, or scratched will grade lower and sell for less.
You can also explore a detailed breakdown of 1991 quarter values by grade and variety to get a solid benchmark before heading to a dealer or auction platform.
Apps like CoinKnow are also a great starting point. They use image recognition and up-to-date pricing data to give you a fast, reliable estimate without needing to visit a coin shop first. It’s especially helpful if you’ve inherited a collection and need to quickly sort through what’s worth pursuing further.
Should You Sell or Hold Your 1991-S Washington Quarter?
For most people, the 1991-S is a coin worth holding onto if it’s in high-grade proof condition — particularly in DCAM. It’s not going to make you rich overnight, but it’s a clean, attractive coin that serious collectors still actively seek.
If you have a full 1991-S proof set in its original government packaging, that set holds value better than individual coins. Dealers typically pay more for complete sets, and original holders protect the coins from environmental damage.
If you’re sitting on a large number of lower-grade proof coins, selling in bulk might make more sense. Use CoinKnow or similar tools to sort and identify what you have before approaching a buyer — knowledge is your best negotiating tool.
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FAQ
Q: Is the 1991-S Washington Quarter rare?
A: Not rare in the traditional sense — nearly 2.8 million were minted. However, finding one in perfect PR70 DCAM condition is genuinely uncommon, and those command a premium among collectors.
Q: Where is the mint mark on a 1991-S Washington Quarter?
A: The “S” mint mark is located on the obverse (front) of the coin, just below Washington’s portrait near the date. It’s a small but important detail that tells you this was struck in San Francisco as a proof coin.
Q: Can I get my 1991-S quarter professionally graded?
A: Absolutely. PCGS and NGC are the two most trusted grading services in the U.S. Submitting a coin typically costs $20–$50 depending on the service tier, so it’s most worth it for coins you believe are in PR69 or PR70 condition.
