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

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.

The 11-year program, "the 50 State Quarter program," ran from 1999 to 2008, during which each state was given a specific quarter design. Most U.S. state quarters retain their original value of $0.25.

Add Yahoo as a preferred source to see more of our stories on Google. PHILADELPHIA — Some rare U.S. state quarters are no longer worth just 25 cents. Collectors say a few special coins from the 50 ...

The 50 State Quarters program ran from 1999 through 2008, and it remains one of the most collected coin series in American history. Most of those quarters are worth exactly 25 cents. A small number, ...