Otsego County is a county located in the U.S. state of New York. As of the 2010 census, the population was 62,259. The county seat is Cooperstown. The name Otsego is from a Mohawk word meaning "place of the rock."
In 1789, Ontario County was split off from Montgomery. The area split off from Montgomery County was much larger than the present county, as it included the present Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston, Monroe, Niagara, Orleans, Steuben, Wyoming, Yates, and part of Schuyler and Wayne counties.
The formation of Otsego County
Otsego County was one of three counties split off from Montgomery (the other two being Herkimer, and Tioga). Otsego County was officially established on February 16, 1791, with Cooperstown as its county seat, although at the time the village of Cherry Valley was much larger. The original county consisted of three large townships:
Otsego and Cherry Valley together roughly covered the area of modern Otsego County, while Harpersfield covered the area south of the current county as far as the Delaware River.
The original appointments to Otsego County government positions, made by Governor George Clinton included:
The founding of new towns
By 1793, four towns had been added to the county by division of the existing towns:
Areas of Otsego County used to form new counties
The area of Otesgo County was reduced by a number of subsequent splits.