Portage Des Sioux, MO is a city located in Saint Charles County, Missouri and has a land area of 18.65 square miles (48.30 km2). The water area for the city is 3.05 square miles or 7.90 km2. There is one unique zip code in Portage Des Sioux, Missouri and it is 63373. The area code(s) for Portage Des Sioux is 636.
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