Demographics & People — Crystal Lake, Illinois
Population Overview
| Population (Census) | 40,436 |
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| Estimated 2026 | ~40,900 |
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| Median Age | 39.3 |
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| Total Households | 14,917 |
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| Family Households | 10,800 |
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| Average Household Size | 2.69 |
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| Diversity Index | 0.2771 (somewhat diverse) |
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Race & Ethnicity
| White | 34,365 |
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| Black or African American | 226 |
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| Asian | 1,375 |
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| Hispanic or Latino | 4,892 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 10,165 |
| Unclassified or not reported | 9,257 |
| Irish | 6,154 |
| Other groups | 6,148 |
| Italian | 4,827 |
| Hispanic: Hispanic or Latino | 4,658 |
| Polish | 4,517 |
| English | 3,245 |
| Hispanic: Mexican | 3,002 |
| Swedish | 1,413 |
Language
| English Only | 33,193 |
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| Spanish | 3,365 |
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| Population 5+ | 38,735 |
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Veterans
| Veterans | 1,640 |
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| Population 18+ | 31,011 |
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Commuting
| Mean Commute Time | 29.3 minutes |
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| Work from Home | 15.0% |
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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 Crystal Lake, Illinois.
