Westernville, NY is a city located in Oneida County, New York and has a land area of 26.64 square miles (69.00 km2). The water area for the city is 0.04 square miles or 0.10 km2. There is one unique zip code in Westernville, New York and it is 13486. The area code(s) for Westernville is 315.
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