Oyens is a city in Plymouth County, Iowa, United States. The population was 92 at the time of the 2020 census. Oyens is located at 42°49′10″…Oyens is a city in Plymouth County, Iowa, United States. The population was 92 at the time of the 2020 census. Oyens is located at 42°49′10″N 96°3′28″W / 42.81944°N 96.05778°W. According to the United States Census Bureau, the city has a total area of 0.09 square miles, all land.
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