Not nearly enough information. Please post a new question with the denomination and date of the coin.
It can only be on the front, back or edge of a coin.
On Morgan dollars (the type minted at the time), the mint mark is on the back, towards the bottom, just above the letters "do" in the word "dollar." And if there's no mint mark, it means it was minted in Philadelphia.
If there is one it's on the back above the letters DO in the word dollar.
The mint mark is located on the reverse [tails] side of the coin at the bottom below the wreath. If there is no mint mark then the coin was minted at the Philadelphia Mint.
It would be on the back, beneath the eagle's tail feathers.
If there is one it's on the back above the letters DO in the word dollar.
If there is one it's on the back above the letters DO in the word dollar
The mint mark on all Washington quarters dated from 1932 to 1964 is on the back side above the "R" in the word Quarter. No mint mark = Philadelphia S = San Francisco D = DenverOther datesQuarters dated 1965-67 don't have mint marks. Starting in 1968 the mint mark was moved to the right of the tail of Washington's wig, and in 1980 Philadelphia coins started using a P mint mark.
It depends on the type of coin the date and denomination on were the mint mark is located
The lack of a mint mark usually indicates that the coin was minted in Philadelphia.
If it doesn't have a mint mark, that means it was made in Philadelphia.
The mint mark position on all "Mercury" dimes is next to the E in ONE on the back. No mint mark = Philadelphia S = San Francisco D = Denver