Demographics & People — Arlington, Illinois
Population Overview
| Population (Census) | 181 |
| Estimated 2026 | ~100 |
| Median Age | 51.9 |
| Total Households | 78 |
| Family Households | 53 |
| Average Household Size | 2.32 |
| Diversity Index | 0.0705 (relatively homogeneous) |
Race & Ethnicity
| White | 158 |
| Black or African American | 0 |
| Asian | 0 |
| Hispanic or Latino | 6 |
Heritage & Ancestry
| Group | Count |
| German | 64 |
| Unclassified or not reported | 59 |
| Other groups | 40 |
| Irish | 29 |
| English | 17 |
| Italian | 11 |
| Polish | 11 |
| French (except Basque) | 6 |
| Hispanic: Mexican | 6 |
| Hispanic: Hispanic or Latino | 6 |
Language
| English Only | 174 |
| Spanish | 0 |
| Population 5+ | 179 |
Veterans
| Veterans | 8 |
| Population 18+ | 159 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Arlington, Illinois.