Nassau Countyis asuburbancountyonLong Islandin theU.S. stateofNew York. At the2010 census, the county's population was 1,339,532, estimated to have increased to 1,361,350 in 2015.Thecounty seatis located in the Village ofGarden City, within the boundaries of theMineola11501 zip code.
Located immediately east ofNew York City, within the New York-Newark-Bridgeport, the county is one of the four counties that occupy Long Island, together withSuffolk Countyto its immediate east andQueensandKingscounties to the west, which correspond, respectively, to the New York Cityboroughsof Queens and Brooklyn. Two cities, threetowns, 64 incorporatedvillages, and more than 60 unincorporatedhamletsare located within the county. There are 56 public school districts within the county.Post office districts and school districts use the same names as a city, hamlet, or village within them, but each sets the boundaries independently.
In 2012,Forbesmagazine, in an article based on the U.S. Census Bureau'sAmerican Community Survey, reported that Nassau County was one of the highest income counties in the United States and the most affluent in the state of New York, comprising four of the nation's top ten towns by median income. It also ranks as the most expensive county in America. Nassau County also has a designatedpolice department,fire commission,and elected executive and legislative bodies.