What years were coins minted with mintmark s?

Coins minted with the "S" mintmark, indicating they were produced at the San Francisco Mint, have been made in various years across different denominations. Notably, the "S" mintmark appeared on coins from the late 19th century, such as the 1900 and 1904 Barber half dollars, and continued through the 20th century with coins like the 1932-S quarter and the 1968-S Lincoln penny. The mintmark has been used on numerous coins, including commemoratives and special issues, with specific years varying by denomination and series. For a complete list, it's best to refer to specific numismatic references.