Mason City Micro
Mason City has lower-than-average household income, with a median household income of $69,633. Population has declined 8% since 2000. Median home value has more than doubled since 2000, reaching $163,371. With a median age of 44.0, the population is older than the US median of 38.9. It sits in the top 10% of US metro areas for household income.
Population & growth
PEP 2025 EST:49,710 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Education
Commute & transportation
Work & employment
People & community
Principal cities
2 component counties
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How many people live in Mason City, IA?
Mason City, IA has about 49,982 residents according to the 2024 American Community Survey.
What is the median household income in Mason City, IA?
The typical household in Mason City, IA earns about $69,633 a year. Half of households make more than that, and half make less.
Is Mason City, IA expensive?
In Mason City, IA, the median home is worth about $163,371, and the typical rent is about $836 a month.
How educated are people in Mason City, IA?
About 23.3% of adults age 25 and over in Mason City, IA hold a bachelor's degree or higher.
What is the poverty rate in Mason City, IA?
About 10.2% of people in Mason City, IA live below the federal poverty line.
Has Mason City, IA grown since 1990?
Yes, Mason City, IA has shrunk since 1990. The population has lost about 4,742 residents, a change of about -9 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · METRO ROLLUP OF COMPONENT COUNTIES · UPDATED 2024