Suffolk County is a
suburban county on
Long Island and the easternmost county in the
U.S. state of
New York. At the
2010 census, the county's population was 1,493,350, estimated to have increased to 1,502,968 in 2014, making it the fourth-most populous county in New York. Its
county seat is
Riverhead, though some county offices are located in
Hauppauge. The county was named after the county of
Suffolk in
England, from where its earliest European settlers came.