Long Island Commission for Aquifer Protection

Population

Long Island has not always been developed the way that it is today. In the early 1900s the population was greatest in Kings County and Queens County. Kings County was mainly multiple-family homes and was fairly industrialized whereas Queens County was dominantly suburbs and Nassau and Suffolk Counties were rural. As the 1920s came about Queens County saw a drastic population increase and industrial development as industry grew and the New York City Transit system was extended into the county. By the end of World War Two and into the late 1940s and the 1950s, Nassau County saw a transition from rural to suburban expansion. This transition to suburban, single family homes spread into Western Suffolk County from 1950-1960 to total a 141% increase in the county’s population.  Currently, approximately 3million live in Nassau and Suffolk County combined. More specifically, according to the 2010 census 1.34 million live in Nassau County and 1.49 million live in Suffolk County.