ZIP Code 50402

About Mason City

Mason City is a city in and the county seat of Cerro Gordo County, Iowa, United States. The population was 27,338 in the 2020 census. Mason City is known for its musical heritage, as a onetime industrial center for brickyards and cement production, and for being home to a significant collection of Prairie School style architecture. Along with nearby Clear Lake, the city forms a regional commercial, industrial, and cultural hub for north-central Iowa.

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