Demographics & People — Monticello, Iowa
Population Overview
| Population (Census) | 4,055 |
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| Estimated 2026 | ~4,100 |
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| Median Age | 42.6 |
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| Total Households | 1,788 |
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| Family Households | 909 |
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| Average Household Size | 2.19 |
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| Diversity Index | 0.1185 (relatively homogeneous) |
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Race & Ethnicity
| White | 3,690 |
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| Black or African American | 66 |
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| Asian | 35 |
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| Hispanic or Latino | 143 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 1,728 |
| Irish | 776 |
| Unclassified or not reported | 770 |
| Other groups | 544 |
| English | 477 |
| American | 317 |
| Hispanic: Hispanic or Latino | 234 |
| Hispanic: Mexican | 210 |
| European | 110 |
| African | 85 |
Language
| English Only | 3,628 |
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| Spanish | 128 |
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| Population 5+ | 3,791 |
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Veterans
| Veterans | 242 |
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| Population 18+ | 3,137 |
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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 Monticello, Iowa.
