For those who may not be familiar with Montauk:
Montauk is a hamlet (an unincorporated area) in the extreme east part of the Town of East Hampton, on the eastern end of the South Fork in the extreme southeast part of Suffolk County.
Beginning on the north and moving in a clockwise direction, the Hamlet of Montauk is bordered on the north and east by Long Island Sound; on the south by the Atlantic Ocean; and, on the west by the Hamlet of Napeague.
The Hamlet of Montauk has a different border than does the "Montauk, NY 11954" ZIP Code postal zone (i.e., a place can have a "Montauk, NY 11954" mailing address and not be in the Hamlet of Montauk): places that have a "Montauk, NY 11954" mailing address that are not in the Hamlet of Montauk are in the Hamlet of Napeague.
For a good set of town-by-town maps showing all the villages and hamlets in each of LI's 13 towns (3 in Nassau County and 10 in Suffolk County):
//www.city-data.com/forum/long-...-resource.html