Demographics & People — South Plainfield, New Jersey
Population Overview
| Population (Census) | 24,231 |
| Estimated 2026 | ~25,000 |
| Median Age | 41.7 |
| Total Households | 8,280 |
| Family Households | 6,751 |
| Average Household Size | 2.89 |
| Diversity Index | 0.6298 (highly diverse) |
Race & Ethnicity
| White | 13,316 |
| Black or African American | 2,655 |
| Asian | 3,879 |
| Hispanic or Latino | 4,517 |
Heritage & Ancestry
| Group | Count |
| Other groups | 9,338 |
| Italian | 4,590 |
| Hispanic: Hispanic or Latino | 4,476 |
| Unclassified or not reported | 3,847 |
| Irish | 2,853 |
| German | 2,295 |
| Polish | 1,877 |
| Hispanic: South American | 1,414 |
| Hispanic: Puerto Rican | 1,186 |
| Hispanic: Central American | 820 |
Language
| English Only | 15,206 |
| Spanish | 2,884 |
| Population 5+ | 22,577 |
Veterans
| Veterans | 725 |
| Population 18+ | 19,402 |
Commuting
| Mean Commute Time | 29.7 minutes |
| Work from Home | 16.4% |
| Commuter Profile | N/A |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for South Plainfield, New Jersey.