Population
24,891
South PlainfieldCensus, July 2025
From 24,273 in July 2020 to 24,891 in July 2025.
The Census Bureau's estimate of everyone living here on July 1.
South Plainfield by the numbers
Official figures for South Plainfield. Each one shows its date, its source and the area it covers. A figure for a larger area says so.
People
Change in a year
+0.3%
South PlainfieldCensus, 2024 to 2025
Change in the population estimate over one year, from July 1 to July 1, both from the same release.
Change over 5 years
+2.6%
South PlainfieldCensus, 2020 to 2025
Change in the population estimate over five years, from July 1 to July 1, both from the same release.
Sources
- U.S. Census Bureau, Population Estimates, Vintage 2025 · Public domain
Figures are shown as each source publishes them. Survey figures carry a 90% margin of error. A figure for a larger area is labelled with that area.