Millbrook is a village in Dutchess County, New York, United States. It is located on the same side of the Hudson River as Poughkeepsie, Hopewell Junction, East Fishkill, and Wappingers Falls. It is most commonly referred to as the low-key version of the Hamptons, and is one of the most affluent towns in New York State. As of the 2010 Census, Millbrook's population was 1,452. Millbrook is located in the Hudson Valley, an hour and thirty minute drive upstate of New York City.