Hannastown, PA is a city located in Westmoreland County, Pennsylvania and has a land area of 0.28 square miles (0.73 km2). The water area for the city is 0.01 square miles or 0.03 km2. There is one unique zip code in Hannastown, Pennsylvania and it is 15635. The area code(s) for Hannastown is 724/412/878.
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