Suffolk County is a county located in the U.S. state of New York. Making up the central and eastern portion of Long Island, it is the easternmost county in the state and part of the New York metropolitan area. Largely suburban, it is the fourth-most populous county in the state, with 1,493,350 people as of the 2010 census. It was named after the county of Suffolk in England, from where its earliest settlers came. The largest of Long Island's four counties, and the second-largest of 62 in the state, it measures in length and in width at its widest (including water). Its county seat is Riverhead, though many county offices are in Hauppauge on the west side of the county where most of the population lives. There are also offices in Smithtown, for the legislature, Yaphank, and Farmingville.
Suffolk and Nassau counties together are generally referred to as "Long Island" by area residents — as distinct from the New York City boroughs of Queens (Queens County) and Brooklyn (Kings County), which together make up the island's western end.
Suffolk County was an original county of the Province of New York, one of twelve created in 1683. It was known for a time as East Riding of Yorkshire. Its boundaries were essentially the same as at present, with only minor changes in the boundary with its western neighbor, which was originally Queens County but has been Nassau County since the separation of Nassau from Queens in 1899.
According to the Suffolk County website, the county is the leading agricultural county in the state of New York, saying that: "The weather is temperate, clean water is abundant, and the soil is so good that Suffolk is the leading agricultural county in New York State. That Suffolk is still number one in farming, even with the development that has taken place, is a tribute to thoughtful planning, along with the excellent soil, favorable weather conditions, and the work of dedicated farmers in this region."