The letter "P" is used for the Philadelphia mint mark on all coins (except cents) released from 1980 onward. Before this it had only been used on silver Jefferson nickels from 1942 to 1945.

Between 1973 and 1986 there was no mint mark (these coins are indistinguishable from coins produced at the Philadelphia Mint from 1973 to 1980); after 1988 the letter "W" was used for coinage, except for the 2009 Ultra High Relief Double Eagle.

The Carson City mint is now the home of the Nevada State Museum, which still strikes commemorative medallions with the "CC" mint mark (most recently in 2014 commemorating the Nevada Sesquicentennial), using former mint's the original coin press.

Although the mint mark "D" has been used by two separate mints, it is easy to distinguish between the two, as any 19th‑century coinage is Dahlonega, and any 20th- or 21st‑century coins are Denver.

During the period in which this mint branch was operational, The Philippines was an insular territory and then commonwealth of the U.S.; it was the first (and to date only) U.S. branch mint located outside the Continental United States.

The letter "M" was used for the Manila mint mark on all coins released from 1925 onward; before this it had produced its coins with no mintmark.

During the Civil War, Dahlonega Mint which was located in Georgia, operated under the control of the State of Louisiana (February 1861) and the Confederate States of America (March 1861) until it ran out of bullion later in that year; some Half Dollars have been identified as being the issue of the State of Louisiana and the Confederacy.