Mason City, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Mason City, Illinois had a total population of 2,159, the 489th largest city in Illinois, with a median household income of $66,524, which is 20% lower than the state average. The poverty rate is 16.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 1.4x.
Mason City Quick Facts
How Mason City Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 2,094 | 2,159 | +3.1% |
| Median household income | $64,250 | $66,524 | +3.5% |
| Median home value | $92,200 | $91,100 | -1.2% |
How Mason City Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 61 | National average: 61
Education
Educational Attainment (Adults 25+)
Mason City Rankings in Illinois
Explore Illinois Rankings
Other Cities in Mason County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Havana | 2,989 | $41,184 | 24.0% | $95,300 |
| Manito | 1,692 | $71,920 | 8.3% | $112,600 |
| Easton | 285 | $61,250 | 16.5% | $81,700 |
| Kilbourne | 268 | $44,107 | 15.7% | $72,500 |
| Bath | 224 | $47,500 | 13.4% | $63,200 |
| Forest City | 223 | $87,813 | 28.2% | $86,300 |
| Goofy Ridge | 125 | $38,750 | 16.0% | $54,300 |
| Topeka | 47 | $77,500 | 0.0% | $31,300 |
Cities Similar to Mason City
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Cambridge | 2,128 | $64,979 | $123,100 | 15.6% | 13.1% |
| Catlin | 2,160 | $72,277 | $124,700 | 28.2% | 3.9% |
| Nokomis | 2,147 | $60,326 | $83,900 | 11.9% | 9.4% |
| South Roxana | 2,181 | $60,214 | $88,700 | 5.7% | 22.3% |
| Farmington | 2,050 | $65,223 | $101,300 | 25.9% | 11.0% |
Population Overview
Mason City is a small community located in Illinois, within Mason County. The total population is 2,159. It ranks as the 489th most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Mason City is 49.8 years. This is 28% higher than the state median of 39.0 years. 12.2% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Mason City is $66,524. This is 20% lower than the state median of $83,390. It is also 18% lower than the national median of $80,734. The poverty rate stands at 16.7%. This is 41% higher than the state poverty rate of 11.8%. The unemployment rate is 4.2%. This is 27% lower than the state rate of 5.8%. The median home value is $91,100. Housing costs are 65% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.4x, Mason City is one of the most affordable housing markets in the area. 78.3% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 67.1%.
Race & Ethnicity
Mason City has a predominantly White (non-Hispanic) population, comprising 95.5% of all residents. Black or African American residents account for 0.8%. The White (non-Hispanic) population is significantly higher than the state average (95.5% vs 58.1%). The Black or African American population (0.8%) is well below the state average of 13.3%. The Hispanic or Latino population (0.8%) is well below the state average of 18.8%.
Education
21.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% lower than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.9%.
Data Sources & Methodology
All demographic data for Mason City, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Mason City, Illinois?
Mason City, Illinois has a population of 2,159 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Mason City, IL?
The median household income in Mason City is $66,524, which is 18% lower than the national median of $80,734.
What is the poverty rate in Mason City, IL?
The poverty rate in Mason City is 16.7%. This means approximately 350 residents live below the federal poverty line.
What is the racial makeup of Mason City, Illinois?
Mason City's population is 95.5% White, 0.8% Black, 0.8% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Mason City, IL?
The median home value in Mason City is $91,100. The home-value-to-income ratio is 1.4x.
How educated is Mason City, Illinois?
21.1% of adults (25+) in Mason City hold a bachelor's degree or higher, and 6.1% hold a graduate or professional degree.