Montgomery is a town in Orange County, New York, United States. The population was 22,606 at the 2010 census. It was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 at the Battle of Quebec.The Town of Montgomery is in the northern part of the county at the county line shared by Ulster County. Montgomery is immediately west of the Town of Newburgh. It contains three villages, one also called Montgomery, as well as Walden and most of Maybrook.