<Tr> <Th> FIPS code </Th> <Td> 36 - 63473 </Td> </Tr> <Tr> <Th> GNIS feature ID </Th> <Td> 0962854 </Td> </Tr> <P> Ronkonkoma (/ rɒŋˈkɒŋkəmə / rong - KONGK - ə - mə) is a hamlet and census - designated place (CDP) on Long Island in the Town of Islip, New York, United States . The population of the CDP was 19,082 at the 2010 census . The Ronkonkoma post office has the ZIP code of 11779, and serves parts of several hamlets and CDPs adjacent to Ronkonkoma . </P> <P> Since 1988, Ronkonkoma has been the end of electrification along the Long Island Rail Road's Main Line . The track between Hicksville and Ronkonkoma has for a long time been referred to as the Ronkonkoma Branch . </P>

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