Houstonia, MO is a city located in Pettis County, Missouri and has a land area of 66.25 square miles (171.59 km2). The water area for the city is 0.40 square miles or 1.04 km2. There is one unique zip code in Houstonia, Missouri and it is 65333. The area code(s) for Houstonia is 660.
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