 otsego county is a county located in the u.s. state of new york. at 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." otsego county comprises the oneonta, ny micropolitan statistical area. ==history==  thumb|right|250px|map of otsego county, at its formation  thumb|right|250px|1829 map of otsego county, new york 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: *cherry valley in the northeast, *otsego in the northwest, and *harpersfield in the south. otsego and cherry valley together roughly covered the area of modern otsego county, while harpersfield covered the area south of the cu
1791_establishments_in_New_York Catskills Counties_of_Appalachia New_York_counties Otsego_County,_New_York