Willow Grove, PA is a city located in Montgomery County, Pennsylvania and has a land area of 4.60 square miles (11.91 km2). The water area for the city is 0.01 square miles or 0.03 km2. There is one unique zip code in Willow Grove, Pennsylvania and it is 19090. The area code(s) for Willow Grove is 215/267/445.
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