Demographics & People — Grenloch, New Jersey
Population Overview
| Population (Census) | 748 |
| Estimated 2026 | ~500 |
| Median Age | 48.2 |
| Total Households | 244 |
| Family Households | 200 |
| Average Household Size | 3.04 |
| Diversity Index | 0.1466 (relatively homogeneous) |
Race & Ethnicity
| White | 711 |
| Black or African American | 7 |
| Asian | 14 |
| Hispanic or Latino | 39 |
Heritage & Ancestry
| Group | Count |
| Irish | 248 |
| German | 140 |
| Italian | 135 |
| Unclassified or not reported | 105 |
| Other groups | 70 |
| English | 49 |
| Polish | 46 |
| Hispanic: Hispanic or Latino | 45 |
| Austrian | 33 |
| Hispanic: Puerto Rican | 32 |
Language
| English Only | 724 |
| Spanish | 10 |
| Population 5+ | 748 |
Veterans
| Veterans | 0 |
| Population 18+ | 591 |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Grenloch, New Jersey.