Glenallen, MO is a city located in Bollinger County, Missouri and has a land area of 108.76 square miles (281.69 km2). The water area for the city is 0.31 square miles or 0.80 km2. There is one unique zip code in Glenallen, Missouri and it is 63751. The area code(s) for Glenallen is 573.
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