The 2005-S Oregon State Quarter is worth anywhere from $2.00 in standard Clad Proof condition to over $100 for high-grade Silver Proof specimens. While most quarters you find in pocket change are only worth their face value, the “S” mint mark indicates a special coin produced specifically for collectors.
| Coin Type (2005-S Oregon) | Average Value (PR65-67) | High-End Value (PR69-70) |
|---|---|---|
| Clad Proof | $1.50 – $4.00 | $10.00 – $25.00 |
| 90% Silver Proof | $12.00 – $18.00 | $45.00 – $110.00+ |
What Makes the 2005-S Oregon Quarter Special?
If you have stumbled upon a 2005 Oregon quarter with an “S” mint mark, you aren’t looking at an ordinary circulation coin. Unlike the “P” (Philadelphia) or “D” (Denver) versions, the “S” quarters were struck at the San Francisco Mint specifically for collectors. These coins feature a “proof” finish, characterized by mirrored backgrounds and frosted details that make Crater Lake look stunningly vivid.
To determine if your find is truly a treasure, many enthusiasts use the best coin identifier app to distinguish between different minting varieties. Because these coins were sold in protective sets, finding one in your change usually means someone broke open a set. This makes the 2005-S Oregon quarter a rare sight in the wild.
When evaluating these coins, the strike quality is everything. The San Francisco Mint used polished dies and planchets to ensure every detail of the Mount Mazama landscape and the Douglas fir trees was perfect. If you want to compare your coin against professional data, you can check the current 2005 quarter market value to see how the market is performing for collector-grade issues.
Understanding the Difference: Clad vs. Silver Proofs
The 2005-S Oregon State Quarter comes in two distinct compositions. This is the most important factor in determining the price. The standard “Clad” proof is made of the same copper-nickel alloy as your everyday quarters. However, the United States Mint also produced a “Silver Proof” version, which consists of 90% silver and 10% copper.
Identifying a silver quarter is relatively simple. Look at the edge of the coin; if you see a solid silver stripe with no copper color showing through, you likely have the silver version. The weight is also a giveaway: a clad quarter weighs 5.67 grams, while a silver quarter weighs 6.25 grams. Using a tool like CoinHix can help you log these details and track the precious metal content of your collection.
The silver content adds an “intrinsic value” which means the coin is worth a certain amount just for the metal, regardless of its condition. As silver prices fluctuate, the base value of the Oregon Silver Proof follows suit. For many casual collectors, finding a silver “S” mint mark is like finding a small piece of bullion in a pile of change.
| Composition | Weight (g) | Edge Appearance |
|---|---|---|
| Copper-Nickel Clad | 5.67g | Copper/Orange stripe visible |
| 90% Silver | 6.25g | Solid white/silver edge |
Grading and Condition: Why PR70 Matters
In the world of coin collecting, the “grade” is a number from 1 to 70 that describes how perfect a coin is. For proof coins like the 2005-S Oregon quarter, we use the prefix “PR” (Proof). A coin graded PR70 is “Deep Cameo” or “Ultra Cameo,” meaning it has no visible flaws even under 5x magnification. These are the “Holy Grail” for Registry Set collectors.
Most 2005-S quarters found in original mint packaging will grade between PR67 and PR69. However, if the coin has been handled or spent as money, it will develop surface scratches known as “hairlines.” These significantly lower the value. For those looking for historical auction sales and price histories of State Quarters, it becomes clear that only the highest grades command three-figure prices.
If you believe your coin is a perfect PR70 candidate, it might be worth sending it to a professional grading service like PCGS or NGC. Before spending the money on grading fees, you can use the CoinHix app to compare your coin’s luster and detail against high-resolution images of certified samples. This helps you avoid spending $30 to grade a coin that is only worth $10.
Historical Context: The Oregon State Quarter Design
Released on June 6, 2005, the Oregon quarter was the 33rd coin issued in the 50 State Quarters Program. The design features a magnificent view of Crater Lake from the south-southwest, including Wizard Island and the watchtower at Watchman Peak. The reverse was designed by Donna Weaver and engraved by Norman E. Nemeth.
The design was chosen to represent Oregon’s natural beauty. Crater Lake is the deepest lake in the United States and is famed for its crystal-clear blue water. For collectors, the 2005-S proof versions capture this beauty far better than the duller “P” or “D” business strikes. The frosted “snow” on the peaks and the deep mirror-like “water” of the lake create a three-dimensional effect.
Because the Oregon quarter is part of a larger set, there is constant demand from people trying to complete their State Quarter collections. While millions were made, the “S” proofs were minted in much smaller quantities—roughly 3.3 million for the clad version and about 1.6 million for the silver version. Compared to the nearly 500 million combined “P” and “D” quarters, the San Francisco coins are relatively scarce.
Market Value Guide for 2005-S Quarters
The market for State Quarters has stabilized over the last decade. While they don’t see the massive price spikes of rare 19th-century coins, their popularity remains high due to nostalgia. The 2005-S Oregon quarter sits in a comfortable price bracket where it is affordable for new collectors but still carries a premium.
A raw (unauthenticated) 2005-S Clad Proof typically sells for $2.00 to $5.00 on platforms like eBay. If it is in its original plastic lens from the US Mint, it might fetch slightly more. Silver versions generally start at $12.00, mostly dictated by the spot price of silver. However, if the coin has a beautiful “toning”—a natural rainbow coloration that develops on silver over time—it can attract much higher bids from specialized collectors.
| Grade | Clad Value | Silver Value |
|---|---|---|
| PR65 | $2.00 | $12.50 |
| PR68 | $6.00 | $22.00 |
| PR70 DCAM | $25.00 | $115.00 |
How to Store Your Oregon State Quarter
If you have a 2005-S Oregon quarter, proper storage is crucial to maintaining its value. Proof coins are extremely sensitive to skin oils and environmental moisture. Touching the surface of the coin with your bare thumb can leave permanent fingerprints that “eat” into the metal over time. This is especially true for the silver versions.
Always handle your coins by the edges, or better yet, wear lint-free cotton gloves. For long-term storage, use PVC-free plastic flips or airtight capsules. Many collectors prefer to keep their coins in the original US Mint Proof Set packaging, as this guarantees the provenance and protects the coin from physical damage.
If you find a proof quarter in circulation, it has likely already been “impaired.” An impaired proof has scratches, dirt, or signs of wear. While it still holds the “S” mint mark, its value drops significantly, often to just a dollar or two. However, keeping it in a dedicated album or using an app like CoinHix to catalog your “found” proofs is a great way to start a low-cost, high-reward hobby.
FAQ
Q: Why is my 2005 Oregon quarter shiny but doesn’t have an “S”?
A: If your coin is very shiny but has a “P” or “D” mint mark, it is likely a “uncirculated” business strike rather than a proof. These were minted for general use but haven’t been worn down by pocket change yet. They are generally only worth face value (25 cents) unless they are in exceptional condition.
Q: Is there a 2005-S Oregon quarter error to look for?
A: While no major widespread errors are listed for the 2005-S proof, collectors often look for “striking errors” like double dies or off-center strikes. However, since proof coins are inspected individually at the mint, errors on “S” mint coins are incredibly rare and highly valuable if found.
Q: Where can I sell my 2005-S Oregon Silver Quarter?
A: You can sell your quarter at local coin shops, through online auctions like eBay, or at hobbyist forums. For silver versions, the easiest way is a coin shop, but for high-grade PCGS/NGC certified coins, online auctions typically yield the highest prices.
Q: How can I tell for sure if it is silver without a scale?
A: The “Tissue Test” is a common trick. Lay a single ply of white tissue paper over the quarter and another ordinary quarter. The silver coin will appear bright white through the tissue, while the clad coin will appear dark or grey.
