Oneonta (/ˌoʊniˈɒntə/ OH-nee-ON-tə) is a city in southern Otsego County, New York. According to the 2010 U.S. Census, it had a population of 13,901. Its nickname is "City of the Hills." While the word "oneonta" is of undetermined origin, it is popularly believed to mean "place of open rocks" in the Mohawk language. This refers to a prominent geological formation known as "Tablerocks" at the western end of the city.

The city is surrounded by the town of Oneonta, a separate municipal and political jurisdiction. Oneonta Municipal Airport (N66) is north of the city.

Indigenous ancestors of Algonquin and Iroquoian-speaking Native Americans inhabited the land in the territory of Oneonta for thousands of years before European colonists pillaged the area. The Five Nations of the Iroquois Confederacy are believed to have emerged and gained dominance prior to the 15th century; they were in place at the time of early French and Dutch colonization.

The area's early European-American settlers did not arrive until around 1775 and consisted mainly of ethnic Palatine German and Dutch settlers moving out of the Hudson and eastern Mohawk valleys. The first such settler in the area now known as the Town of Oneonta was Henry Scramling (b. ~1743; d. 1808). He had secured a grant of 1,000 acres in the Susquehanna Valley, moved from German Flatts and settled about 1773 in the Oneonta Plains near the mouth of the Otego Creek. He left during the Revolution and returned after the conflict with his brothers, George and David Scramling, and his brothers-in-law, John and David Young. Their farms were not far from the mouth of the Otego Creek. The army led by General James Clinton passed through the area in order to join the Sullivan Expedition in 1779 against Iroquois settlements.

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