Demographics & People — Marietta-Alderwood, Washington
Population Overview
| Population (Census) | 3,569 |
|---|
| Estimated 2026 | ~4,200 |
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| Median Age | 38.3 |
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| Total Households | 1,527 |
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| Family Households | 911 |
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| Average Household Size | 2.34 |
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| Diversity Index | 0.3138 (somewhat diverse) |
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Race & Ethnicity
| White | 2,449 |
|---|
| Black or African American | 0 |
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| Asian | 154 |
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| Hispanic or Latino | 398 |
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Heritage & Ancestry
| Group | Count |
|---|
| Other groups | 959 |
| Irish | 627 |
| Unclassified or not reported | 575 |
| Norwegian | 441 |
| German | 408 |
| English | 333 |
| Hispanic: Mexican | 329 |
| Hispanic: Hispanic or Latino | 329 |
| Polish | 243 |
| Italian | 100 |
Language
| English Only | 2,929 |
|---|
| Spanish | 475 |
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| Population 5+ | 3,522 |
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Veterans
| Veterans | 211 |
|---|
| Population 18+ | 2,762 |
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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-Alderwood, Washington.
