Demographics & People — Onslow, Iowa
Population Overview
| Population (Census) | 306 |
|---|
| Estimated 2026 | ~200 |
|---|
| Median Age | 30.0 |
|---|
| Total Households | 103 |
|---|
| Family Households | 77 |
|---|
| Average Household Size | 2.97 |
|---|
| Diversity Index | 0.103 (relatively homogeneous) |
|---|
Race & Ethnicity
| White | 282 |
|---|
| Black or African American | 9 |
|---|
| Asian | 0 |
|---|
| Hispanic or Latino | 7 |
|---|
Heritage & Ancestry
| Group | Count |
|---|
| German | 118 |
| Unclassified or not reported | 87 |
| Irish | 85 |
| Other groups | 61 |
| English | 21 |
| Dutch | 14 |
| American | 11 |
| Hispanic: Mexican | 8 |
| Hispanic: Hispanic or Latino | 8 |
| Norwegian | 7 |
Language
| English Only | 290 |
|---|
| Spanish | 0 |
|---|
| Population 5+ | 290 |
|---|
Veterans
| Veterans | 12 |
|---|
| Population 18+ | 198 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Onslow, Iowa.
