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Mason City, IA Demographics

Mason City, IA is the 17th most populous of 1027 cities in Iowa, with 27,338 residents across 28 square miles. That is about 981 people per square mile.

At the 2020 census

Population 27,338
Land area 28 sq mi
Density 981 / sq mi

Data: 2020 Decennial Census · land area from Census TIGER/Line

How Mason City, IA compares to the US

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About this page

City statistics cover the municipal boundary only, not the wider metro area.

Figures come from the 2020 census and the American Community Survey, compared against national averages.

Read how BlockAtlas computes population within an area →