 eastport is a hamlet and census-designated place (cdp) in suffolk county, new york, united states. the population was 1,831 at the 2010 census. eastport straddles the border of the towns of brookhaven and southampton. eastport is located within the eastport-south manor central school district. ==geography== eastport is located at . according to the united states census bureau, the cdp has a total area of , of which 
Brookhaven,_New_York Census-designated_places_in_New_York Census-designated_places_in_Suffolk_County,_New_York Hamlets_in_New_York Hamlets_in_Suffolk_County,_New_York Populated_coastal_places_in_New_York Southampton_(town),_New_York