Northumberland is a very old, historic town, the 4th oldest town in Saratoga County. It is bounded by the towns of Moreau, Saratoga and Wilton and the Hudson River. It contains almost 20,000 acres.

Agriculture is the main industry in the town. Northumberland has a steel fabrication plant, a golf course, a public airport and many other small businesses.

There are approximately 4200 residents. The main centers of population are the hamlets of Gansevoort, Bacon Hill and Northumberland. The largest housing development being Terrel Hills.

The town is served by two school districts, Schuylerville and South Glens Falls, two emergency squads, two volunteer fire departments and three post offices.