, commander at the
Battle of Oriskany in 1777 and namesake of Herkimer 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 1794,
Onondaga County was split off from Herkimer County. This county was larger than the current Onondaga County, and included the present
Cayuga,
Cortland, and part of
Oswego counties. In 1798, portions of Herkimer and Tioga counties were taken to form
Chenango County. Another part of Herkimer was split off to form
Oneida County. It was then larger than the current Oneida County, including the present
Jefferson,
Lewis, and part of
Oswego counties. In 1802, parts of Herkimer,
Clinton and
Montgomery counties were combined to form the new
St. Lawrence County. The rural economy was first based on general agriculture and then wheat, but after the opening of the Erie Canal, Herkimer farmers found that they could not compete with grain farmers to the west. By the mid-19th century, they had begun to specialize in dairy farming and created a cheese industry that supplied the New York City market, among others. During the
American Civil War, Herkimer contributed five companies to the
34th New York Volunteer Infantry Regiment, leading to the unit's nickname "The Herkimer Regiment". The
Herkimer County Jail, constructed in 1834, was used to hold the murderer
Chester Gillette before his trial at the Herkimer County Courthouse. The jail is now disused, except for tours by the
Herkimer County Historical Society. The
Herkimer County shootings took place in 2013, killing five people. ==Geography==