Demographics & People — Riverdale, Iowa
Population Overview
| Population (Census) | 408 |
| Estimated 2026 | ~400 |
| Median Age | 41.8 |
| Total Households | 166 |
| Family Households | 117 |
| Average Household Size | 2.46 |
| Diversity Index | 0.2139 (somewhat diverse) |
Race & Ethnicity
| White | 334 |
| Black or African American | 21 |
| Asian | 6 |
| Hispanic or Latino | 17 |
Heritage & Ancestry
| Group | Count |
| German | 153 |
| Other groups | 117 |
| Unclassified or not reported | 90 |
| Irish | 59 |
| English | 56 |
| Hispanic: Hispanic or Latino | 48 |
| Italian | 29 |
| French (except Basque) | 28 |
| Hispanic: Colombian | 27 |
| Hispanic: South American | 27 |
Language
| English Only | 361 |
| Spanish | 4 |
| Population 5+ | 387 |
Veterans
| Veterans | 65 |
| Population 18+ | 405 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Riverdale, Iowa.