| Place Name | South Plainfield |
| Place Type | Borough |
| ZIP Code(s) | 07080 |
| County | Middlesex County |
| Area Code(s) | 908 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 23,397 |
| Population Growth Rate (2010-19) | 4.08% |
| Majority Ethnicity | White 57.4% |
| Metro/Micro Stats Area | New York-Newark-Jersey City, NY-NJ-PA |
| US Congressional District(s) | New Jersey 6th |
| State Assembly Districts | 18 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 57.4% |
| African American | 12.1% |
| Hispanic | 0% |
| Asian | 13.04% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 17.43% |