Plainfield city, New Jersey
Official LSAD Designation: Plainfield city • Census GEOID: 3459190
• Union County
Demographics & Population Profile
Population and demographics for Plainfield city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 57,141 | — | 2025 | Census |
| Median Age | 32.4 yrs | ±0.9 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 15,907 | ±615 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).