Demographics & People — Marietta, Ohio
Population Overview
| Population (Census) | 13,282 |
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| Estimated 2026 | ~13,000 |
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| Median Age | 39.4 |
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| Total Households | 6,004 |
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| Family Households | 3,006 |
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| Average Household Size | 2.02 |
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| Diversity Index | 0.0929 (relatively homogeneous) |
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Race & Ethnicity
| White | 12,501 |
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| Black or African American | 217 |
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| Asian | 152 |
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| Hispanic or Latino | 261 |
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Heritage & Ancestry
| Group | Count |
|---|
| Unclassified or not reported | 4,468 |
| German | 3,107 |
| Irish | 1,906 |
| English | 1,598 |
| Other groups | 1,580 |
| American | 1,024 |
| Italian | 432 |
| Polish | 283 |
| French (except Basque) | 274 |
| Scotch-Irish | 267 |
Language
| English Only | 12,224 |
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| Spanish | 52 |
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| Population 5+ | 12,653 |
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Veterans
| Veterans | 1,062 |
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| Population 18+ | 10,977 |
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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 Marietta, Ohio.
