Bethpage is a hamlet located on Long Island within the Town of Oyster Bay in Nassau County, New York, United States, as well as a census-designated place (CDP) with borders slightly different from those of the hamlet. The CDP's population was 16,543 at the 2000 United States Census.
The area is served by the Bethpage Post Office, ZIP code 11714, whose boundaries are slightly different from that of the CDP. The area is also served by the Bethpage Union Free School District, the boundaries of which include parts of some surrounding hamlets, including parts of Old Bethpage, Plainview, and Plainedge. The Town of Hempstead, on its website, includes a small part of Bethpage hamlet that is in the Levittown census-designated place.
The name Bethpage comes from the Quakers, who named the area after the Biblical town Bethphage, which was between Jericho and Jerusalem in the Holy Land. Present-day Bethpage was part of the 1695 Bethpage Purchase. An early name for the northern section of present-day Bethpage was Bedelltown, a name that appeared on maps at least as late as 1906.