Marissa, Illinois Demographics & Population 2026
During the 2020–2024 ACS period, Marissa, Illinois had a total population of 1,232, the 642nd largest village in Illinois, with a median household income of $54,814, which is 34% lower than the state average. The poverty rate is 12.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 34% below the state average, indicating significant economic challenges.
- Housing is very affordable with a home-value-to-income ratio of just 1.8x.
- Unemployment rate of 14.2% is notably above the national average.
Marissa Quick Facts
How Marissa 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 | 1,133 | 1,232 | +8.7% |
| Median household income | $48,393 | $54,814 | +13.3% |
| Median home value | $87,000 | $99,500 | +14.4% |
How Marissa 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+)
Marissa Rankings in Illinois
Explore Illinois Rankings
Other Cities in St. Clair County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Belleville | 41,370 | $63,535 | 14.6% | $141,300 |
| O'Fallon | 32,262 | $105,982 | 6.2% | $295,700 |
| East St. Louis | 17,999 | $35,700 | 32.8% | $52,600 |
| Fairview Heights | 16,745 | $80,930 | 8.8% | $177,700 |
| Swansea | 14,710 | $91,587 | 8.7% | $223,600 |
| Shiloh | 14,572 | $99,573 | 6.8% | $274,000 |
| Columbia | 11,127 | $107,606 | 5.4% | $293,000 |
| Mascoutah | 8,816 | $97,375 | 9.8% | $224,900 |
| Freeburg | 4,592 | $92,065 | 6.7% | $241,200 |
| Lebanon | 4,474 | $88,750 | 14.8% | $170,700 |
Cities Similar to Marissa
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Toledo | 1,197 | $56,354 | $86,100 | 17.1% | 18.1% |
| Assumption | 1,205 | $57,500 | $89,700 | 16.6% | 11.7% |
| Chrisman | 1,214 | $58,462 | $79,400 | 20.6% | 17.9% |
| Milledgeville | 1,218 | $59,417 | $94,200 | 19.3% | 11.3% |
| Royalton | 1,214 | $59,219 | $71,500 | 19.6% | 11.0% |
Population Overview
Marissa is a small community located in Illinois, within St. Clair County. The total population is 1,232. It ranks as the 642nd most populous out of 1,445 Census-designated places in Illinois.
Age Demographics
The median age in Marissa is 42.9 years. This is 10% higher than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Marissa is $54,814. This is 34% lower than the state median of $83,390. It is also 32% lower than the national median of $80,734. The poverty rate stands at 12.8%. This is 8% higher than the state poverty rate of 11.8%. The unemployment rate is 14.2%. This is 144% higher than the state rate of 5.8%. The median home value is $99,500. Housing costs are 62% lower than the state median of $263,300. With a home-value-to-income ratio of just 1.8x, Marissa is one of the most affordable housing markets in the area. 78.7% of occupied housing units are owner-occupied. This homeownership rate is 17% higher than the state average of 67.1%.
Race & Ethnicity
The largest racial or ethnic group in Marissa is White (non-Hispanic), making up 82.8% of the population. Hispanic or Latino residents account for 5.0%. The Hispanic or Latino population (5.0%) is well below the state average of 18.8%.
Education
12.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 68% 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 97.6%.
Data Sources & Methodology
All demographic data for Marissa, 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 Marissa, Illinois?
Marissa, Illinois has a population of 1,232 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Marissa, IL?
The median household income in Marissa is $54,814, which is 32% lower than the national median of $80,734.
What is the poverty rate in Marissa, IL?
The poverty rate in Marissa is 12.8%. This means approximately 156 residents live below the federal poverty line.
What is the racial makeup of Marissa, Illinois?
Marissa's population is 82.8% White, 0.0% Black, 5.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Marissa, IL?
The median home value in Marissa is $99,500. The home-value-to-income ratio is 1.8x.
How educated is Marissa, Illinois?
12.3% of adults (25+) in Marissa hold a bachelor's degree or higher, and 6.0% hold a graduate or professional degree.