The close of the Revolutionary War found the valley lands of the Susquehanna River and its tributaries still sparsely settled. However, strong factors now pushed colonists westward. In 1787, a treats with the Indians had moved the so-called Indian Frontier to the far side of the Unadilla River, out of the area called Otsego. Also, most of the lands east of this had been sold or granted by the colonial government to men who were land speculators. The land had been surveyed and divided into lots ready for disposal. Frequently these grants required that these lands become tenanted.
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U.S. Census information
Your link for the official Otsego County Website.