Levittown is a census-designated place (CDP) and planned community in Bucks County, Pennsylvania, United States, within the Philadelphia metropolitan area. The population was 52,983 at the 2010 census. It is 40 feet (12 m) above sea level. Though not a municipality, it is sometimes recognized as the largest suburb of Philadelphia in Pennsylvania (while Upper Darby Township, Lower Merion Township, Bensalem Township, Abington Township and Bristol Township are municipalities larger in size in the three surrounding Pennsylvania counties). It was planned and built by Levitt & Sons. The brothers Bill Levitt and architect Alfred Levitt designed its typical houses.