Herkimer County is a county located in the U.S. state of New York. It was created in 1791 north of the Mohawk River out of part of Montgomery County. As of the 2010 census, the population was 64,519
Herkimer County is in central New York State, northwest of Albany, and east of Syracuse. The northern part of the county is in the Adirondack Park. The Mohawk River flows across the south part of the county.