Levittown, formerly Island Trees, is a hamlet and census-designated place in the Town of Hempstead in Nassau County, New York on Long Island. It is located half way between the villages of Hempstead and Farmingdale. As of the 2010 census, the CDP had a total population of 51,881, making it the most populated CDP in Nassau County and the second most populated CDP on Long Island, behind only Brentwood.Levittown gets its name from its builder, the firm of Levitt & Sons, Inc. founded by Abraham Levitt on August 2, 1929, which built the district as a planned community between 1947 and 1951. Sons William and Alfred served as the company's president and chief architect and planner, respectively. Levittown was the first truly mass-produced suburb and is widely regarded as the archetype for postwar suburbs throughout the country. William Levitt, who assumed control of Levitt & Sons in 1954, is considered the father of modern suburbia in the United States.