Plainfield Population

1870–2026

51,010

2026 projection

14% since 2020 (increase)

010K20K30K40K50K60K18801900192019401960198020002020

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 Plainfield. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202651,010+9671.93%
202550,043+1,2182.49%
202448,825+1,2462.62%
202347,579+1,2682.74%
202246,311+7011.54%
202145,610+8481.89%
202044,762+2490.56%
201944,513+2260.51%
201844,287+2770.63%
201744,010+9072.10%

Showing 10 of 31 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.

Growth since 2020, compared

Plainfield is growing faster than Will County, Illinois, and the U.S.

  • Plainfield+11.3%
  • United States+3.1%
  • Will County+2.2%
  • Illinois−0.6%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Plainfield Demographics

37.5median age

Median age

Female37.7 yrs
Male36.9 yrs

Adults

33,390
4,621 seniors (65+) · 14% of adults28,769 other adults

Sex

Female 49.8% · 23,277Male 50.2% · 23,431

Population by age

MaleFemale85+ years, male: 18485+ years, female: 26080–84 years, male: 26580–84 years, female: 23375–79 years, male: 28475–79 years, female: 50670–74 years, male: 61070–74 years, female: 61565–69 years, male: 1,00965–69 years, female: 65560–64 years, male: 96160–64 years, female: 1,28155–59 years, male: 1,72155–59 years, female: 1,40250–54 years, male: 1,81950–54 years, female: 1,96445–49 years, male: 2,14045–49 years, female: 1,92740–44 years, male: 1,46540–44 years, female: 1,82935–39 years, male: 1,96935–39 years, female: 1,94930–34 years, male: 1,10530–34 years, female: 1,21525–29 years, male: 1,28025–29 years, female: 1,03920–24 years, male: 1,33120–24 years, female: 1,34715–19 years, male: 1,81815–19 years, female: 1,92310–14 years, male: 2,26910–14 years, female: 1,8695–9 years, male: 1,8305–9 years, female: 1,9120–4 years, male: 1,3710–4 years, female: 1,35185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–41K1K2K2K

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 467 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

Plainfield Income

$144,000median household income

Median household income

$144,000

Half of households earn more, half earn less

Median earnings

$79,562

Typical yearly pay for a worker 25 or older.

Poverty rate

4.2%

About 1 in 24 residents

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

Plainfield Marital Status

60% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married60%61%59%
Never married30%33%28%
Divorced6%5%7%
Widowed3%2%5%
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