Suffolk County is a Borough in New York that had total population of 1,419,369 in 2000 according to the US Census. Suffolk County ranks 6th highest on Average Adjusted Gross Income of any Borough in New York.

The most populous Cities within Suffolk County are Brentwood (53,883), West Babylon (43,452), Commack (36,330), Coram (34,979) and Central Islip (31,881).