  islip ( ) is a hamlet and census-designated place (cdp) that lies within the much larger town of islip in suffolk county, new york. located on the south shore of long island, the cdp had a population of 18,869 at the time of the 2010 census, a decline of 8% from the 2000 census. ==geography== according to the united states census bureau, the cdp of islip has a total area of .  is land and , or 2.43%, is water. islip is situated on long island's south shore, on the north side of great south bay, across from [[fire
Census-designated_places_in_New_York Census-designated_places_in_Suffolk_County,_New_York Hamlets_in_New_York Hamlets_in_Suffolk_County,_New_York Islip_(town),_New_York