Upper Union Zip Code Zip Codes in Upper Union, New York Zip Code Area Code 12309 518 Get Map Schools in Upper Union Birchwood Elementary School (K-5, UE) Craig School (K-5) Hillside School (K-5, UE) Howe International Magnet School (K-6) Iroquois Middle School (6-8) Niskayuna High School (9-12) Rosendale School (K-5) Van Antwerp Middle School (6-8)

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