Mid-Island is frequently applied to a series of neighborhoods within New York City, USA's borough of Staten Island.
Under the definition most commonly adhered to, Mid-Island comprises all of the communities whose ZIP Code is 10314, plus Sunnyside within zip code 10301, along with the western slope of Todt Hill. Mid-Island communities thus include Graniteville, Bulls Head, Willowbrook, and New Springville, Sometimes the localities situated along the Arthur Kill between the Staten Island Expressway and the Fresh Kills — Bloomfield, Chelsea and Travis — are said to be on the island's West Shore; otherwise they too would fall within Mid-Island as their zip code is 10314.
Like all of Staten Island except for the North Shore, farms dominated the Mid-Island region until the 1960s, when new home construction began to rise sharply. The opening of the Verrazano-Narrows Bridge in 1964 did much to stimulate this construction, but the effects of this phenomenon were first seen most profoundly on the East Shore, not spreading inland until nearly the end of the decade. In addition to starting somewhat later, the population boom experienced in Mid-Island also exhibited some important demographic differences from that which took place to the east, as in Mid-Island Jewish transplants (from Queens as well as Brooklyn) tended to predominate, in contrast to the heavily Italian-American influx experienced on the East Shore. These demographic differences are not present today with mostly Italian-Americans dominating the area.