For those who may not be familiar with Massapequa Park:
Massapequa Park is a village (incorporated in 1931) in the southeast part of the Town of Oyster Bay, in the southeast part of Nassau County.
Beginning on the north and moving in a clockwise direction, the Village of Massapequa Park in the Town of Oyster Bay is bordered on the north by the Hamlet of North Massapequa and the Hamlet of South Farmingdale; on the east by the Hamlet of East Massapequa; on the south by South Oyster Bay and the Hamlet of Massapequa; and, on the west by the Hamlet of Massapequa and the Hamlet of North Massapequa.
The Village of Massapequa Park has a different border than does the "Massapequa Park, NY 11762" postal zone (i.e., a place can have a the "Massapequa Park, NY 11762" mailing address and not be in the Village of Massapequa Park): places that have a "Massapequa Park, NY 11762" mailing address but are not in the Village of Massapequa Park are in the Hamlet of Massapequa, the Hamlet of North Massapequa and the Hamlet of East Massapequa.
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):
Excellent Long Island Geographic Resource