Maynardville, TN is a city located in Union County, Tennessee and has a land area of 79.96 square miles (207.10 km2). The water area for the city is 7.11 square miles or 18.41 km2. There is one unique zip code in Maynardville, Tennessee and it is 37807. The area code(s) for Maynardville is 865.
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