Where is the mint mark on a US dime?

Answer 1

Answer

For dimes minted in 1964 and earlier, the mint mark is usually on the reverse, or "tails" side, of the coin. Many times the mint mark gets lost in the rest of the design. A poor strike or a well-circulated, well-worn coin may obliterate the mint mark, or make it otherwise unrecognizable.

Specific positions for the major designs:

• Liberty Seated dimes 1838-1860: on the reverse side below the word DIME (*)
  
• Liberty Seated dimes 1860-1891: reverse side below the wreath (*)
  
• Barber dimes 1892-1916: reverse side below the wreath
• Mercury dimes 1916-1945: reverse side next to the E in ONE
• Roosevelt dimes 1946-1964: reverse side next to bottom of the torch
• Roosevelt dimes 1968-present: front side above the date
  

Mint mark letters are as follows:

• No mint mark (up to 1979) or P (1980 and later) = Philadelphia
• D = Denver (1906-present)
  
• S = San Francisco (up to 1955; proofs only 1968-present)
  
• O = New Orleans (up to 1909)

(*) The mint mark position was moved during the middle of 1860 so it may be in either position for dimes with that date.