Demographics & People — Duncan, South Carolina
Population Overview
| Population (Census) | 4,175 |
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| Estimated 2026 | ~4,600 |
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| Median Age | 34.4 |
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| Total Households | 1,676 |
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| Family Households | 1,063 |
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| Average Household Size | 2.47 |
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| Diversity Index | 0.5556 (moderately diverse) |
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Race & Ethnicity
| White | 2,335 |
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| Black or African American | 1,695 |
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| Asian | 0 |
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| Hispanic or Latino | 326 |
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Heritage & Ancestry
| Group | Count |
|---|
| Other groups | 2,008 |
| Unclassified or not reported | 1,149 |
| Hispanic: Hispanic or Latino | 367 |
| English | 331 |
| German | 300 |
| Hispanic: Mexican | 269 |
| Irish | 216 |
| African | 182 |
| Subsaharan African | 182 |
| Italian | 70 |
Language
| English Only | 3,418 |
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| Spanish | 48 |
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| Population 5+ | 3,773 |
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Veterans
| Veterans | 144 |
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| Population 18+ | 2,921 |
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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 Duncan, South Carolina.
