As of the 2010 census, the population was 1,009, out of 1,971 residents in the entire town of Hadley.

Hadley CDP is in northern Saratoga County, in the southeastern part of its town.

It is bordered to the east by the Hudson River, across which is the town of Lake Luzerne in Warren County.

The Sacandaga River forms the southern edge of Hadley, joining the Hudson at the community's southeastern corner.

This article about a location in Saratoga County, New York is a stub.