Where is the mint mark on a Jefferson nickel?

From 1968 to the present the mintmark has been located on the obverse of the coin, just below the date and to the right of the portrait of Jefferson. Possible mint marks are:

No mint mark = Philadelphia, 1968-1979

P = Philadelphia, 1980-present

D = Denver

S = San Francisco (1968-71)

From 1938-1942 and 1946-1964, the mintmark was located to the right of the base of the Monticello on the reverse of the coin. The composition of these coins were 75% copper and 25% nickel. Note that coins produced by the Philadelphia mint had no mintmark.

From 1965-1967, no nickels had mintmarks, regardless of where they were produced.

From mid 1942-1945, the mintmark was large and located directly above the Monticello on the reverse of the coin. This was to signify a change in the composition of the nickel during these years to 56% copper, 35% silver and 9% manganese. Coins produced by the Philadelphia mint did have a mintmark for the first time.

All other nickels since 1866 have been made of 75% copper and 25% nickel.