Where Is a Mint Mark on a Quarter?

By GovMint :

The iconic Washington Quarter was introduced in 1932. Initially, the mint mark appeared on the reverse, below the wreath, just above the "R" at the end of the word "Quarter." The mark stayed in this position until 1964. Then, in 1968 the mint mark was shifted to the coin's obverse, appearing near the ribbon tying Mr. Washington's braid where it still appears today.  

 In 1980 the Mint added the P mint mark to signify that the coin was struck in Philadelphia and abandoned the "no mint mark" policy. The P has appeared on circulating quarters ever since.

Washington Quarters have been struck in Philadelphia, San Francisco, Denver, and West Point, but did not always carry their respective mint marks. Rather famously, in 2019 and 2020, the Mint released the exciting "W Quarters," which were the first quarters struck at the West Point Mint that also carried its "W" mint mark. There are eight different America the Beautiful designs with a total of 2 million coins each carrying the iconic “W” mint mark. These coins were released directly into circulation to encourage collectors to "check their change" during the Great American Coin Hunt.

Sources Used:

https://www.interestingfacts.com/fact/6386d2b1bd1439000808d979

Concept of the Month: Fun Facts About Coins - Young Americans Center (yacenter.org)