Marietta, MN is a city located in Lac Qui Parle County, Minnesota and has a land area of 92.10 square miles (238.54 km2). The water area for the city is 0.67 square miles or 1.74 km2. There is one unique zip code in Marietta, Minnesota and it is 56257. The area code(s) for Marietta is 320.
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