South Plainfield Population

1930–2026

25,026

2026 projection

2.8% since 2020 (increase)

05K10K15K20K25K30K19401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for South Plainfield. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202625,026+1350.54%
202524,891+760.31%
202424,815+4081.67%
202324,407+1670.69%
202224,240+50.02%
202124,235-1030.42%
202024,338-100.04%
201924,348+590.24%
201824,289+900.37%
201724,199+1270.53%

Showing 10 of 25 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

South Plainfield Demographics

41.7median age

Median age

Female43 yrs
Male40.3 yrs

Adults

19,352
4,758 seniors (65+) · 25% of adults14,594 other adults

Sex

Female 50% · 12,229Male 50% · 12,244

Population by age

MaleFemale85+ years, male: 20785+ years, female: 43580–84 years, male: 19580–84 years, female: 34375–79 years, male: 32975–79 years, female: 37270–74 years, male: 55270–74 years, female: 54665–69 years, male: 97765–69 years, female: 80260–64 years, male: 76860–64 years, female: 92455–59 years, male: 74855–59 years, female: 92250–54 years, male: 81250–54 years, female: 76845–49 years, male: 73745–49 years, female: 69540–44 years, male: 85640–44 years, female: 1,04935–39 years, male: 99335–39 years, female: 92430–34 years, male: 79830–34 years, female: 61025–29 years, male: 65825–29 years, female: 58520–24 years, male: 61020–24 years, female: 72415–19 years, male: 87615–19 years, female: 46910–14 years, male: 55110–14 years, female: 5605–9 years, male: 8145–9 years, female: 7320–4 years, male: 7630–4 years, female: 76985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–4500500

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 245 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

South Plainfield Income

$130,239median household income

Median household income

$130,239

Half of households earn more, half earn less

Median earnings

$72,089

Typical yearly pay for a worker 25 or older.

Poverty rate

3%

About 1 in 34 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

South Plainfield Marital Status

61% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married61%63%59%
Never married26%29%24%
Divorced6%5%8%
Widowed6%3%9%
Separated<1%1%<1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources