For those who may not be familiar with Greenlawn:
Greenlawn is a hamlet (an unincorporated area) in the central part of the Town of Huntington, in the northwest part of Suffolk County.
Beginning on the north and moving in a clockwise direction, the Hamlet of Greenlawn in the Town of Huntington is bordered on the north by the Hamlet of Centerport; on the east by the Hamlet of East Northport and the Hamlet of Elwood; on the south by the Hamlet of Elwood, the Hamlet of Dix Hills, the Hamlet of South Huntington and the Hamlet of Huntington Station; and, on the west by the Hamlet of Huntington Station and the Hamlet of Huntington.
The Hamlet of Greenlawn has a different border than does the "Greenlawn, NY 11740" ZIP Code postal zone (i.e., a place can have a "Greenlawn, NY 11740" mailing address and not be in the Hamlet of Greenlawn and a place can have other than a "Greenlawn, NY 11740" mailing address and be in the Hamlet of Greenlawn): places that have a "Greenlawn, NY 11740" mailing address that are not in the Hamlet of Greenlawn are in the Hamlet of Huntington and the Hamlet of Elwood; and, at the same time, there are places in the Hamlet of Greenlawn with a "Huntington, NY 11743" mailing address.
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):
http://www.city-data.com/forum/long-...-resource.html