Be careful drawing any conclusions from the population statistics because both the
Hamlet of Greenvale (163 acres) and the "
Greenvale, NY 11548" ZIP Code postal zone (244 acres) are
very small compared to most other communities.
For those who may not be familiar with Greenvale:
Greenvale is a hamlet (an unincorporated area) partly in the northeast part of the Town of North Hempstead and partly in the northwest part of the Town of Oyster Bay, in the north-central part of Nassau County.
Beginning on the north and moving in a clockwise direction, the Hamlet of Greenvale in the Towns of North Hempstead and Oyster Bay is bordered on the north by the Village of Roslyn Harbor in the Towns of North Hempstead and Oyster Bay; on the east by the Village of Old Brookville; on the south by the Village of East Hills in the Towns of Oyster Bay and North Hempstead; and, on the west by the Village of Roslyn Harbor in the Town of North Hempstead.
The Hamlet of Greenvale has a different border than does the "Greenvale, NY 11548" ZIP code postal zone (there are places that have a "Greenvale, NY 11548" mailing address that are not in the Hamlet of Greenvale): places that have a "Greenvale, NY 11548" mailing address that are not in the Hamlet of Greenvale are in the Village of Roslyn Harbor and the Village of East Hills in the Town of North Hempstead and in the Village of Brookville in the Town of Oyster Bay.
Complicating the geography even more, the "Greenvale, NY 11548" postal zone is a bifurcated postal zone, with two noncontiguous areas separated by the "Glen Head, NY 11545" postal zone.
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