What is is the population of the county that contains the Edwin H. Armstrong House?
Westchester County, New York Westchester County is a county in the U.S. state of New York. It is the second-most populous county on the mainland of New York, after the Bronx. 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. Situated in the Hudson Valley, Westchester covers an area of 450 sqmi , consisting of 6 cities, 19 towns, and 23 villages. Established in 1683, Westchester was named after the city of Chester, England. The county seat is the city of White Plains, while the most populous municipality in the county is the city of Yonkers, with an estimated 200,807 residents in 2016.
Teton County, Wyoming Teton County is a county located in the U.S. state of Wyoming. As of the 2010 census, the population was 21,294. Its county seat is Jackson. It is east from the Idaho state line.