Boston Corner is a hamlet of the town of Ancram in Columbia County, New York, United States and the town of Northeast in Dutchess County. The District of Boston Corner was incorporated by Massachusetts in 1838 from a tract of unincorporated land west of the town of Mount Washington, Massachusetts, and was ceded from Massachusetts to New York on January 11th, 1855, because its geographical isolation from the rest of Massachusetts made maintaining law and order difficult.