Western New York is the westernmost region of the state of New York. It includes the cities of Buffalo, Rochester, Niagara Falls, the surrounding suburbs, as well as the outlying rural areas of the Great Lakes lowlands, the Genesee Valley, and the Southern Tier. The historic beginnings of the region can be defined by its original eastern boundary of Preemption Line, created by the December 16, 1786 political settlement between the states of New York and Massachusetts, both of which claimed political dominion over the land. This eastern boundary shifted because of changing county borders in the late 18th and early 19th centuries.
Historical essay and transcription by John M. Robortella
The Gates Historical Society