Fairfax, MO is a city located in Atchison County, Missouri and has a land area of 138.96 square miles (359.91 km2). The water area for the city is 0.89 square miles or 2.31 km2. There is one unique zip code in Fairfax, Missouri and it is 64446. The area code(s) for Fairfax is 660.
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