Mongaup Valley, NY is a city located in Sullivan County, New York and has a land area of 9.22 square miles (23.88 km2). The water area for the city is 0.49 square miles or 1.27 km2. There is one unique zip code in Mongaup Valley, New York and it is 12762. The area code(s) for Mongaup Valley is 845/914.
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