What Do Mint Marks Mean On Coins? This Tiny Letter Can Be Worth Thousands

Sometimes one of the most important details on a coin is smaller than your fingernail.

A tiny D, S, W, or CC can tell you where a coin was made. On one coin, that letter might make almost no difference at all. On another, the same tiny mark can separate a common coin from one collectors will pay hundreds or even thousands of dollars to own.

That tiny letter is called a mint mark.

What does a mint mark mean?

A mint mark identifies the U.S. Mint facility that produced the coin. Today, the letters most collectors are likely to see are P for Philadelphia, D for Denver, S for San Francisco, and W for West Point.

Mint marks originally had a practical purpose. When the United States began opening branch mints outside Philadelphia, the government needed a way to tell which facility had produced each coin. If there was a problem with the weight or metal purity, the mint mark helped identify where it came from.

For someone looking through coins today, the letters have become something else: clues.

A P usually means Philadelphia. A D on a modern coin means Denver. S means San Francisco, while W means West Point.

D can mean Denver—or Dahlonega

But U.S. coins have been made for long enough that the same letter has not always meant the same place.

Take the letter D.

On a modern quarter or dime, D means Denver. Denver began producing coins in 1906 and remains one of the main Mint facilities today.

But if you find D on certain U.S. gold coins made between 1838 and 1861, it means something completely different: Dahlonega, Georgia.

The Dahlonega Mint was built during the southern gold rush and struck only gold coins. That makes the date just as important as the letter itself. A D mint mark cannot be understood without knowing what type of coin it is and when it was made.

Historic mint marks: C, O and CC

The same is true for several old mint marks that beginners may have never seen.

C stood for Charlotte, North Carolina. The Charlotte Mint operated from 1838 through 1861 and produced gold coins.

O stood for New Orleans. The New Orleans Mint struck coins from 1838 through 1861 and then again from 1879 through 1909.

And CC stood for Carson City, Nevada.

For many collectors, CC is one of the most recognizable mint marks in American coin collecting. The Carson City Mint opened in 1870 near the enormous Comstock Lode silver discovery and produced gold and silver coins through 1893.

Carson City Morgan dollars are especially popular today. Some are relatively obtainable, while others can be extremely valuable depending on the date and condition.

How mint marks affect coin value

That brings up the most important lesson about mint marks: the letter by itself does not determine the value.

An S mint mark does not automatically make a coin rare. Neither does CC, D, or W.

What matters is the combination of the coin, year, mint mark, mintage, condition, and collector demand.

A 1916 Mercury dime from Philadelphia is collectible, but the 1916-D is the famous key date because only 264,000 were struck in Denver.

A 1909 Lincoln cent can be common, while the 1909-S VDB is one of the most recognizable key Lincoln cents.

Morgan dollars provide another great example. Millions were struck at several Mint facilities, but a coin such as the 1893-S Morgan dollar is dramatically scarcer than many other dates in the series.

Same basic design. Same denomination. One little letter can completely change the story.

What if a coin has no mint mark?

So what does it mean when there is no mint mark at all?

Usually, especially on older U.S. coins, no mint mark means the coin was made in Philadelphia.

Philadelphia was the original U.S. Mint facility, so when it was the only Mint, there was no reason to put a letter on the coins. Even after branch mints opened, Philadelphia continued producing most coins without a mint mark.

The first P mint mark did not appear until 1942, when Philadelphia placed a large P above Monticello on wartime Jefferson nickels containing silver.

After World War II, the P disappeared again.

It returned in 1979 on the Susan B. Anthony dollar, and beginning in 1980 Philadelphia used P on most denominations. The cent remained the major exception.

In fact, 2017 was the first and only year Philadelphia circulating pennies carried a P mint mark, added to celebrate the U.S. Mint’s 225th anniversary. So if you find a 2017-P cent, the P itself is unusual, even though the coin is not automatically rare.

Where to find a coin’s mint mark

Where the mint mark appears also changes from coin to coin.

On many modern coins, it is on the front, or obverse, close to the portrait and date.

On older coins, it may be on the reverse. A Morgan dollar, for example, has its mint mark on the back beneath the eagle. Walking Liberty half dollars can have the mint mark in different locations depending on the year. On some coins it is tiny enough that a magnifying glass makes finding it much easier.

If you are unsure, identify the exact coin type first and then find where the mint mark is supposed to appear. Do not assume every small letter on a coin is the mint mark.

Why 1965–1967 coins have no mint marks

There was even a period when the U.S. Mint intentionally removed mint marks entirely.

In the mid-1960s, the United States faced a serious coin shortage. Government officials worried that collectors pulling certain dates and mint marks from circulation could make the shortage worse.

The Coinage Act of 1965 temporarily eliminated mint marks from circulating coins.

As a result, circulating U.S. coins dated 1965, 1966, and 1967 do not carry mint marks, regardless of which facility produced them.

Mint marks returned in 1968.

That detail is useful because beginners sometimes find a 1966 quarter with no letter and assume they discovered an error. They did not. No mint mark was exactly how those coins were supposed to look.

Modern mint marks and West Point quarters

Today, the United States has four primary coin-production facilities: Philadelphia, Denver, San Francisco, and West Point.

Philadelphia and Denver produce huge numbers of circulating coins. San Francisco is especially associated today with proof and collector coins. West Point produces bullion and collector coins and has also occasionally produced circulating coins.

The W mint mark became especially interesting to everyday collectors in 2019 and 2020, when West Point quarters were intentionally mixed into normal circulation. Someone could actually receive a W quarter in change even though West Point coins had traditionally been associated much more with collector and bullion products.

That is part of what makes mint marks worth checking.

Which mint mark is the rarest?

A mint mark affects value when one facility produced significantly fewer examples than another, when fewer coins survived, or when collectors particularly want coins from that location.

But there is no single “rarest mint mark.”

A CC does not automatically beat an S. A C does not automatically beat a D.

Rarity belongs to a specific coin, not simply the letter stamped on it.

Historic Charlotte and Dahlonega gold coins are scarce because those facilities operated for a short period and produced relatively small numbers of coins. Certain Carson City issues are extremely desirable. And individual key dates carrying S or D mint marks can be among the rarest coins in an entire series.

That is why checking the mint mark should always come immediately after checking the date.

Have an unfamiliar coin? Keep it as you found it

If you find an old coin with an unfamiliar mint mark, do not clean it or try to make the letter easier to see by scraping around it. Keep the coin as you found it and look at the date, denomination, and mint mark together.

For anyone in Connecticut or the surrounding area, Haven Coin & Jewelry at 2285 Whitney Ave in Hamden offers free, no-obligation evaluations of U.S. and foreign coins. Coins can be examined individually to determine whether a mint mark, date, condition, or other feature gives the piece additional collector value.

Walk-ins are welcome Tuesday, Wednesday, and Friday from 10am–5pm, Thursday from 10am–7pm, and Saturday from 10am–2pm. For larger collections, you can call (203) 717-4921 and arrange an appointment. Haven is a licensed Connecticut precious metals dealer, not a pawn shop.

Find your reputable dealer!

A mint mark was originally meant to answer a very simple question: Where was this coin made?

More than a century later, that same little letter can answer a much more exciting one: Is this coin different from all the others?

Most of the time, the answer will not change your life.

But in coin collecting, sometimes a letter small enough to miss completely is the exact reason a coin is worth looking at twice.

FAQ: Mint Marks

What does the D mean on a coin?

On modern U.S. coins, D means Denver. On certain gold coins dated 1838–1861, D instead stands for the former Dahlonega Mint in Georgia.

What does the S mean on a penny?

S means the coin was struck at the San Francisco Mint. Some S-mint pennies are common, while specific dates and varieties can be much more valuable.

Which mint mark is the rarest?

There is no single rarest mint mark. Rarity depends on the specific denomination, date, mintage, and surviving population. Historic C, CC, D, O, and certain S-mint issues can all be very scarce.

Does a P on a coin mean anything?

Yes. P means Philadelphia. Philadelphia historically produced many coins without a mint mark, but today most denominations from Philadelphia carry a P. The 2017 cent is especially interesting because it was the first circulating U.S. penny to carry the P mint mark.