What is is the population of the county that contains the Edwin H. Armstrong House?
Edwin H. Armstrong House: The Edwin H. Armstrong House, in Yonkers in Westchester County, New York, is unusual for having achieved listing on the National Register of Historic Places and even designation as a National Historic Landmark, only to be demolished. Westchester County, New York:  According to the 2010 Census, the county had a population of 949,113, estimated to have increased by 2.7% to 974,542 by 2016.
949,113