Hannawa Falls, NY is a city located in Saint Lawrence County, New York and has a land area of 1.43 square miles (3.70 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Hannawa Falls, New York and it is 13647. The area code(s) for Hannawa Falls is 315.
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