The state quarters program, which ran from 1999 to 2008, inspired many new coin collectors, and some of those quarters are worth more than 25 cents today.

Here are 20 rare state quarters worth additional value, according to Gainesville Coins, USA CoinBook and PCGS.

The U.S. Mint's 50 State Quarters Program was wildly popular when it ran from 1999 through 2008, and it's still fun to find these coins today. Billions of coins were minted, and most are worth exactly ...

To celebrate the bicentennial birthday of the United States in 1976, the U.S. Mint released millions of commemorative quarters. Though the quarters are quite common, some rarities are extremely ...