On December 1, 1997, the 50 States Commemorative Coin Program Act was signed into law by President Clinton. Two years later, in 1999, the U.S. Mint began producing the first commemorative state quarters.
First Set
In 1999, the first year of the State Quarters Program, five states were represented: Delaware, Pennsylvania, New Jersey, Georgia, and Connecticut.
Mintage
Like all coins in the United States, state quarters are produced in three specific branches of the U.S. Mint: Denver, Philadelphia, and San Francisco. The exact mint branch where a coin is produced is indicated by the mint mark found just below the year on the coin face.
Mint Marks
The code for coins produced in Denver is "D," whereas Philadelphia is "P" and San Francisco is "S." Most state quarters, like all U.S. coins, are produced in Denver and Philadelphia.
San Francisco Coins
State quarters that are produced in San Francisco, marked with an S, are considered "proofs" or collectors' editions. They are not meant for general circulation and are available only by direct purchase from the U.S. Mint.
Value
In terms of value, there is no difference between state quarters with P and D mint markings.
Beyond the States
When Hawaii was commemorated in 2008, the State Quarters Program completed its initial goal of representing all 50 U.S. states. In 2009, though, the program expanded to include Washington D.C. and U.S. Territories.
References
Resources
Writer Bio
Jeff Katz has been a professional librarian, educator, historian, writer and editor for almost 20 years. He holds a Master of Library Science degree from the University of British Columbia and a BA degree in Classical Studies from Hunter College of the City University of New York.
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