Demographics & People — Monmouth, Illinois
Population Overview
| Population (Census) | 8,794 |
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| Estimated 2026 | ~8,100 |
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| Median Age | 34.1 |
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| Total Households | 3,317 |
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| Family Households | 2,094 |
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| Average Household Size | 2.37 |
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| Diversity Index | 0.4262 (moderately diverse) |
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Race & Ethnicity
| White | 6,636 |
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| Black or African American | 412 |
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| Asian | 356 |
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| Hispanic or Latino | 1,652 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 3,009 |
| Other groups | 2,097 |
| Hispanic: Hispanic or Latino | 1,593 |
| German | 1,476 |
| Hispanic: Mexican | 1,302 |
| Irish | 1,160 |
| English | 533 |
| American | 355 |
| French (except Basque) | 298 |
| Subsaharan African | 273 |
Language
| English Only | 6,888 |
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| Spanish | 973 |
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| Population 5+ | 8,317 |
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Veterans
| Veterans | 370 |
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| Population 18+ | 6,735 |
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Commuting
| Mean Commute Time | 15.5 minutes |
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| Work from Home | 7.5% |
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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 Monmouth, Illinois.
