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. It is named after General Nicholas Herkimer, who died from battle wounds in 1777 after taking part in the Battle of Oriskany during the Revolutionary War. Its county seat is the Village of Herkimer.
Herkimer County is part of the Utica-Rome, NY Metropolitan Statistical Area.
For the history of Herkimer County before 1791, see Montgomery County.
In 1791, Herkimer County was created as one of three counties split off from Montgomery (the other two being Otsego and Tioga counties) as New York State was developed after the American Revolutionary War. Its area was much larger than the present county, however, and was reduced subsequently as more counties were organized.
Part of Herkimer County was included in the Macomb's Purchase of 1791, during the wide-scale sale of public lands after the state forced Iroquois tribes allied with the British during the war to cede their territory. Suddenly the state was selling of land in upstate, central and western New York.
In 1798, portions of Herkimer and Tioga counties were taken to form Chenango County.