Where are US quarters minted?

Answer 1

Circulation quarters are minted at 2 mints:

> Philadelphia (P mint mark to the right of the bow in Washington's wig on coins dated 1980 or later, no mint mark before that) > Denver (D mint mark next to the bow from 1968 to the present, below the wreath on the back up to 1964 Proof quarters are minted for collectors at the San Francisco Mint (S)
At present, all US Coins used for everyday spending are minted in both Philadelphia and Denver. Meanwhile, San Francisco mints proof and collector coins.