what county is hagaman, ny in
Hagaman, New York. Hagaman (/ËheÉªÉ¡ÉmÉn/) is a village in Montgomery County, New York, United States. The population was 1,292 at the 2010 census. It is named after Joseph Hagaman, the founding father. The Village of Hagaman is in the Town of Amsterdam, northeast of the City of Amsterdam.