Dearborn, MO is a city located in Platte County, Missouri and has a land area of 54.03 square miles (139.94 km2). The water area for the city is 0.39 square miles or 1.01 km2. There is one unique zip code in Dearborn, Missouri and it is 64439. The area code(s) for Dearborn is 816.
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