The 1999-P Connecticut Quarter is worth anywhere from its $0.25 face value in circulated condition to over $600 for high-grade specimens. If you just found this coin in your pocket change, it is a fascinating piece of American history that marks the fifth entry in the historic 50 State Quarters Program.

History and Design of the 1999-P Connecticut Quarter

The Connecticut State Quarter was released on October 12, 1999, as the final quarter issued in the inaugural year of the program. Minted in Philadelphia (indicated by the “P” mint mark), this coin features a design that honors the legendary “Charter Oak.” According to local lore, this massive tree was used to hide the Connecticut Colony’s royal charter from British authorities in 1687, making it a symbol of American resistance and heritage.

Many everyday collectors use a top coin identifier app to quickly check the origins of their finds. When you look at the reverse of the coin, you will see the majestic oak tree, the state name, and the date it joined the Union (1788). On the obverse side, you will find a modified portrait of George Washington, which was adjusted specifically for the Statehood series to allow for more text on the front.

If you are curious about how many of these were made, the Philadelphia Mint produced a staggering 688,744,000 units. Because the mintage was so high, most coins you find while shopping or in change jars will only be worth their face value. However, the CoinKnow app can help you distinguish between a common pocket piece and a high-grade investment coin that might be hiding in plain sight.

Determining the Market Value for Different Grades

When evaluating your 1999-P Connecticut quarter, condition is the most critical factor. Most people find “circulated” coins, which show scratches, dullness, or wear from being used in transactions. These are generally worth only 25 cents. However, if you find a coin that looks like it just came from a fresh roll—shiny, with no scratches and sharp details—you might have a “Mint State” (MS) coin.

Serious collectors look for “Gem” specimens, usually graded MS65 or higher. While a standard uncirculated coin might sell for a few dollars, a coin graded MS67 or MS68 can command hundreds of dollars at auction. You can find detailed current market data for 1999 State Quarters that highlights how professional grading impacts the final price tag.

Because the Philadelphia Mint sometimes struggled with quality control during the high-speed production of millions of coins, finding a perfectly struck 1999-P is actually quite difficult. Professional services like PCGS or NGC are often used to certify these high-grade coins. For a quick estimate at home, the CoinKnow app provides a user-friendly way to compare your coin’s condition against high-value examples sold recently.

Price Reference Chart for 1999-P Connecticut Quarters

To help you understand what your coin might be worth, we have compiled a price guide based on recent auction records and numismatic market trends. Please note that values for “Circulated” coins remain at face value unless they possess a major mint error.

Condition Grade	Estimated Value (USD)
Circulated (Average Wear)	$0.25
About Uncirculated (AU58)	$0.50 – $1.00
Mint State (MS63)	$2.00 – $5.00
Mint State (MS65 Gem)	$15.00 – $30.00
Mint State (MS67 High Grade)	$100.00 – $250.00
Mint State (MS68 Top Pop)	$600.00+

Valuable Errors to Look For in Your Connecticut Quarter

Beyond the standard grade of the coin, “errors” are what truly drive up the price for the average person. Since billions of quarters were being pumped out during the late 90s, some mistakes slipped past the quality inspectors at the Mint. These errors are highly sought after by collectors and can turn a common quarter into a windfall.

One of the most famous errors for this specific year is the “Broadstruck” error, where the coin is struck without being held firmly by the collar, resulting in a flat, spread-out appearance. Another common find is the “Die Crack,” where small lines of raised metal appear across the design. These often occur on the Charter Oak tree branches. Finding these requires a keen eye or the advanced imaging features of the CoinKnow platform to identify subtle irregularities.

The most valuable errors involve “clipped planchets” or “off-center strikes.” If your quarter looks like it has a bite taken out of it (from the factory, not from a tool) or if the design is not centered on the metal disc, you could be looking at a coin worth $50 to $100 or more. Investigating the 1999 Connecticut quarter error list and values is the best way to ensure you aren’t spending a small fortune at the vending machine.

How to Care for and Sell Your Quarter Collection

If you believe you have found a high-value 1999-P Connecticut Quarter, the first rule is: never clean it. Cleaning a coin with chemicals or even a soft cloth can create microscopic scratches that destroy its numismatic value. Instead, handle the coin only by the edges and store it in a PVC-free plastic holder or a cardboard “2×2” flip.

When it comes time to sell, you have several options. For common uncirculated coins, local coin shops or online marketplaces like eBay are convenient. However, for potential high-grade coins or significant errors, professional auction houses are better. Always research the “sold” listings rather than “asking” prices to get a realistic view of what buyers are actually paying.

Keeping an organized inventory is essential for any modern collector. Using digital tools to track your collection helps you monitor price fluctuations over time. The Connecticut quarter remains a favorite for many because of its detailed artwork, and while most are common, the hunt for that one perfect MS68 specimen continues to excite hobbyists across the country.

FAQ

Q: Where is the mint mark on the 1999 Connecticut Quarter?

A: The mint mark is located on the obverse (front) of the coin, to the right of George Washington’s ponytail. A “P” signifies the Philadelphia Mint, while a “D” signifies Denver.

Q: Is the 1999-P Connecticut Quarter made of silver?

A: No, the “P” mint quarters found in circulation are made of a copper-nickel clad composition. Only specific Proof sets minted in San Francisco (S mint mark) were produced in 90% silver for collectors.

Q: Why is my 1999 quarter a different color?

A: If the coin looks gold, it was likely plated by a private company after it left the mint for novelty purposes. These usually do not have extra value to serious collectors. If it looks like pure copper, it might be a “missing clad layer” error, which IS valuable.

Q: How can I tell if my coin is MS67 or higher?

A: High-grade coins must have virtually no visible marks under a magnifying glass and possess full “luster” (the way light dances off the surface). Professional grading is usually required to confirm these top-tier grades.