  port washington is a hamlet and census-designated place (cdp) in nassau county, new york on the north shore of long island. as of the united states 2010 census, the community population was 15,846. port washington is a hamlet within and directly governed by the town of north hempstead. with rolling hills and a serpentine coastline in the northwest corner of nassau county, port washington is studded with marinas, yacht clubs and golf courses. the great neck peninsula is across manhasset bay to the west; manhasset and plandome are to the south; roslyn lies southeast. besides an unincorporated area of the town of north hempstead, port washington is home to four incorporated v
Census-designated_places_in_Nassau_County,_New_York Census-designated_places_in_New_York Hamlets_in_Nassau_County,_New_York Hamlets_in_New_York Long_Island_Sound Populated_coastal_places_in_New_York Town_of_North_Hempstead,_New_York