Demographics & People — Marengo, Illinois
Population Overview
| Population (Census) | 7,123 |
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| Estimated 2026 | ~6,800 |
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| Median Age | 31.9 |
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| Total Households | 2,796 |
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| Family Households | 1,722 |
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| Average Household Size | 2.53 |
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| Diversity Index | 0.2255 (somewhat diverse) |
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Race & Ethnicity
| White | 6,555 |
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| Black or African American | 91 |
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| Asian | 0 |
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| Hispanic or Latino | 868 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 2,343 |
| German | 1,919 |
| Other groups | 1,256 |
| Irish | 1,239 |
| Hispanic: Hispanic or Latino | 1,179 |
| Hispanic: Mexican | 1,012 |
| Italian | 823 |
| Polish | 703 |
| Swedish | 262 |
| English | 259 |
Language
| English Only | 5,801 |
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| Spanish | 514 |
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| Population 5+ | 6,497 |
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Veterans
| Veterans | 379 |
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| Population 18+ | 5,612 |
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Commuting
| Mean Commute Time | 30.1 minutes |
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| Work from Home | 8.0% |
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| Commuter Profile | N/A |
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Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marengo, Illinois.
