Marengo city, Illinois Demographics & Population 2026
As of 2026, Marengo city, Illinois has a total population of 7,123, the 279th largest city in Illinois, with a median household income of $72,586, which is 11% lower than the state average. The poverty rate is 15.6%.
Key Takeaways
- Unemployment rate of 8.8% is notably above the national average.
Marengo city Quick Facts
How Marengo city Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
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: 60 | National average: 60
Education
Educational Attainment (Adults 25+)
Marengo city Rankings in Illinois
Explore Illinois Rankings
Cities Similar to Marengo city
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Sandwich city | 7,121 | $77,027 | $239,600 | 20.6% | 7.1% |
| Jerseyville city | 7,432 | $71,623 | $124,200 | 19.2% | 15.2% |
| Robinson city | 7,005 | $67,591 | $102,600 | 27.2% | 7.9% |
| University Park village | 7,109 | $65,580 | $137,800 | 24.3% | 14.5% |
| Chester city | 6,830 | $74,673 | $107,800 | 7.8% | 19.6% |
Population Overview
Marengo city is a small city located in Illinois. The total population is 7,123. It ranks as the 279th most populous out of 1,445 cities and towns in Illinois.
Age Demographics
The median age in Marengo city is 33.3 years. This is 14% lower than the state median of 38.9 years.
Economy, Income & Housing
The median household income in Marengo city is $72,586. This is 11% lower than the state median of $81,702. Compared to the national median of $78,538, household income here is 8% lower. The poverty rate stands at 15.6%. This is 33% higher than the state poverty rate of 11.7%. The unemployment rate is 8.8%. This is 51% higher than the state rate of 5.8%. The median home value is $206,100. Housing costs are 18% lower than the state median of $250,500. With a home-value-to-income ratio of just 2.8x, Marengo city is one of the most affordable housing markets in the area. 68.8% of occupied housing units are owner-occupied. This homeownership rate is 3% higher than the state average of 66.8%.
Race & Ethnicity
The largest racial or ethnic group in Marengo city is White (non-Hispanic), making up 84.5% of the population. Hispanic or Latino residents account for 12.2%. The Black or African American population (1.3%) is well below the state average of 13.6%.
Education
16.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 56% lower than the state rate of 37.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.0%.
Data Sources & Methodology
All demographic data for Marengo city, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. 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. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of Marengo city, Illinois?
Marengo city, Illinois has a population of 7,123 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Marengo city, IL?
The median household income in Marengo city is $72,586, which is 8% lower the national median of $78,538.
What is the poverty rate in Marengo city, IL?
The poverty rate in Marengo city is 15.6%. This means approximately 1,098 residents live below the federal poverty line.
What is the racial makeup of Marengo city, Illinois?
Marengo city's population is 84.5% White, 1.3% Black, 12.2% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Marengo city, IL?
The median home value in Marengo city is $206,100. The home-value-to-income ratio is 2.8x.
How educated is Marengo city, Illinois?
16.5% of adults (25+) in Marengo city hold a bachelor's degree or higher, and 2.9% hold a graduate or professional degree.