Dutchess County is a county located in the U.S. state of New York, in the state’s Mid-Hudson Region of the Hudson Valley. As of the 2010 census, the population was 297,488.The county seat is Poughkeepsie.
Dutchess County is part of the New York-Newark-Jersey City, NY-NJ-PA Metropolitan Statistical Area.

http://en.wikipedia.org/wiki/Dutchess_County,_New_York