Demographics & People — Plymouth, Iowa
Population Overview
| Population (Census) | 405 |
|---|
| Estimated 2026 | ~400 |
|---|
| Median Age | 38.8 |
|---|
| Total Households | 156 |
|---|
| Family Households | 112 |
|---|
| Average Household Size | 2.6 |
|---|
| Diversity Index | 0.0295 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 397 |
|---|
| Black or African American | 2 |
|---|
| Asian | 1 |
|---|
| Hispanic or Latino | 3 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| German | 165 |
| Unclassified or not reported | 137 |
| Norwegian | 41 |
| Italian | 30 |
| Dutch | 27 |
| English | 24 |
| Irish | 20 |
| American | 8 |
| Swedish | 8 |
| Other groups | 8 |
Language
| English Only | 373 |
|---|
| Spanish | 4 |
|---|
| Population 5+ | 380 |
|---|
Veterans
| Veterans | 19 |
|---|
| Population 18+ | 271 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Plymouth, Iowa.
