NYTiz, the Hamlet of Sayville is to the immediate east of the Hamlet of Oakdale.
For those who may not be familiar with Oakdale:
Oakdale is a hamlet (an unincorporated area) in the southeast part of the Town of Islip, in the southwest part of Suffolk County.
Beginning on the north and moving in a clockwise direction, the Hamlet of Oakdale in the Town of Islip is bordered on the north by the Hamlet of Bohemia; on the east by the Hamlet of Sayville and the Hamlet of West Sayville; on the south by the Great South Bay; and, on the west by the Hamlet of Great River.
The Hamlet of Oakdale has a different border than does the "Oakdale, NY 11769" ZIP Code postal zone (i.e., a place can have an "Oakdale, NY 11769" mailing address and not be in the Hamlet of Oakdale): places that have a "Oakdale, NY 11769" mailing address that are not in the Hamlet of Oakdale are in the Hamlet of West Sayville and the Hamlet of Great River.
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