Township · Illinois
Plainfield Township, Illinois
Plainfield Township, township, in Will County, Illinois. Plainfield Township had 85,115 residents on July 1, 2025 by the Census Bureau's estimate, up 3.5% since 2020; the 2020 Census counted 82,236 and the ACS 2020-2024 5-year estimates put it at 83,145 (±62). GEOID 1719760300.
Residents, July 2025 estimate
85,115
Census Bureau estimate (no margin published)
2020 Census count: 82,236 · ACS 2020-2024: 83,145 ±62
Median household income
$127,061
±$3,489 (90% margin)
Illinois: $83,390
Median home value
$321,600
±$6,281 (90% margin)
Illinois: $263,300
Median gross rent
$2,105
±$116 (90% margin)
Illinois: $1,274
Where is Plainfield Township and what county is it in?
Plainfield Township is a township in Will County, Illinois. It covers 33.2 square miles of land, 2,476 residents per square mile in 2020.
3 places lie inside Plainfield Township: Plainfield (village, 44,762 in 2020), Crystal Lawns (CDP, 1,830 in 2020) and Sunnyland (CDP, 822 in 2020). Part of Joliet (city), Romeoville (village) and Crest Hill (city) also lie in it.
Plainfield Township is in the Chicago-Naperville-Elgin, IL-IN metropolitan statistical area, which takes in 13 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Plainfield Township, and is it growing?
The Census Bureau estimates that 85,115 people lived in Plainfield Township on July 1, 2025, up 3.5% since 2020, while Illinois shrank 0.8%. The 2020 Census counted 82,236 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 83,145 (±62).
| Measure | Plainfield Township | Will County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 83,145±62 | 701,462 | +1,130 |
| Households | 25,820±477 | 244,273 | +1,448 |
| Average household size | 3.21±0.06 | 2.84 | −0.15 |
| Housing units | 26,313±490 | 254,278 | +1,246 |
Plainfield Township's population since 2000
From 45,691 in 2000 to 85,115 in 2025: up 86.3%. The 2000, 2010 and 2020 figures are census counts, each for Plainfield Township as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Plainfield Township?
The median resident of Plainfield Township is 35.4 years old; 26.2% are under 18 and 9.5% are 65 or older. The largest group is non-Hispanic white residents at 59.9%, then Hispanic or Latino residents (of any race) at 21.0%. 13.4% of residents were born outside the United States.
| Measure | Plainfield Township | Will County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 35.4±0.8 | 39.1 | no clear change |
| Under 18 years | 26.2%±1.1 pts | 23.6% | – |
| 65 years and over | 9.5%±0.7 pts | 14.6% | – |
| Male | 49.4%±1.2 pts | 49.9% | – |
| Hispanic or Latino (any race) | 21.0%±1.6 pts | 19.8% | no clear change |
| White alone, not Hispanic | 59.9%±2.2 pts | 58.6% | −3.6 pts |
| Black or African American alone, not Hispanic | 10.7%±1.2 pts | 11.6% | +1.7 pts |
| Asian alone, not Hispanic | 4.8%±1.0 pts | 6.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.2%±0.9 pts | 3.4% | – |
| Some other race alone, not Hispanic | 0.4%±0.3 pts | 0.4% | – |
| Born outside the United States | 13.4%±1.5 pts | 13.5% | no clear change |
| Speak a language other than English at home (age 5+) | 22.1%±2.0 pts | 22.4% | – |
| Civilian veterans (age 18+) | 4.1%±0.6 pts | 4.8% | – |
| With a disability | 9.2%±0.8 pts | 10.0% | – |
| No health insurance coverage | 4.0%±0.8 pts | 5.2% | no clear change |
| High school graduate or higher (age 25+) | 94.0%±0.9 pts | 91.8% | – |
| Bachelor's degree or higher (age 25+) | 39.2%±1.9 pts | 37.5% | +7.4 pts |
| Graduate or professional degree (age 25+) | 14.2%±1.3 pts | 14.9% | – |
| Lived in the same house a year earlier | 92.1%±1.4 pts | 92.1% | – |
| Moved from another state in the past year | 0.7%±0.4 pts | 0.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Plainfield Township earn?
Half of Plainfield Township's 25,820 households earn less than $127,061 a year (±$3,489), against $109,984 in Will County and $83,390 in Illinois. In 2015-2019 it was $123,800 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.7% of residents live below the poverty line.
| Measure | Plainfield Township | Will County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $127,061±$3,489 | $109,984 | no clear change |
| Mean household income | $141,254±$3,791 | $134,181 | – |
| Per capita income | $44,718±$1,328 | $47,516 | +$3,498 |
| People below the poverty line | 4.7%±1.2 pts | 7.3% | no clear change |
| Children under 18 below the poverty line | 6.8%±2.5 pts | 9.9% | no clear change |
| Households receiving SNAP | 8.5%±1.5 pts | 10.1% | – |
| Households with a computer | 98.4%±0.5 pts | 97.0% | – |
| Households with a broadband subscription | 96.5%±0.8 pts | 94.1% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Plainfield Township?
Owners occupy 89.2% of Plainfield Township's occupied homes and renters 10.8%. The median owner-occupied home is valued at $321,600 by its owner (±$6,281). The median renter pays $2,105 a month including utilities, and 33.8% of renters pay 35% or more of their income on rent.
| Measure | Plainfield Township | Will County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $321,600±$6,281 | $319,600 | +$46,663 |
| Median gross rent | $2,105±$116 | $1,462 | no clear change |
| Renters paying 35% or more of income on rent | 33.8%±7.1 pts | 43.4% | no clear change |
| Median monthly owner costs, with a mortgage | $2,194±$38 | $2,255 | – |
| Owner-occupied homes | 89.2%±1.4 pts | 82.8% | no clear change |
| Renter-occupied homes | 10.8%±1.4 pts | 17.2% | – |
| Housing units | 26,313±490 | 254,278 | +1,246 |
| Homeowner vacancy rate | 0.6%±0.4 pts | 0.5% | – |
| Rental vacancy rate | 4.0%±3.9 pts | 3.7% | – |
| Single-family detached homes | 81.2%±1.7 pts | 74.4% | – |
| Mobile homes | 0.3%±0.2 pts | 1.3% | – |
| Built 2020 or later | 1.9%±0.5 pts | 1.2% | – |
| Built 2010 to 2019 | 6.0%±1.1 pts | 6.3% | – |
| Built 1939 or earlier | 2.5%±0.9 pts | 6.9% | – |
| Households with no vehicle | 2.3%±0.6 pts | 3.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Plainfield Township work and get to work?
76.1% of Plainfield Township's workers drive alone and 14.8% work from home. The average trip to work takes 32.4 minutes. The unemployment rate in 2020-2024 averaged 5.0%.
| Measure | Plainfield Township | Will County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 74.4%±1.5 pts | 68.3% | – |
| Unemployment rate | 5.0%±0.9 pts | 4.9% | no clear change |
| Drove alone to work | 76.1%±1.8 pts | 72.9% | – |
| Carpooled | 6.7%±1.1 pts | 8.0% | – |
| Public transportation | 1.1%±0.5 pts | 2.0% | – |
| Walked | 0.3%±0.2 pts | 0.7% | – |
| Worked from home | 14.8%±1.6 pts | 14.7% | +10.8 pts |
| Mean travel time to work | 32.4 min±1.1 | 31.4 min | −2.7 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Plainfield Township?
19 census tracts lie mostly in Plainfield Township (2020 census blocks). Their median household incomes run from $88,533 (Tract 8804.27) to $173,880 (Tract 8804.24).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 8804.31Will County | 6,576 | $128,929 |
| Tract 8804.21Will County | 6,498 | $142,685 |
| Tract 8804.18Will County | 5,215 | $146,458 |
| Tract 8804.29Will County | 5,202 | $165,167 |
| Tract 8804.24Will County | 4,855 | $173,880 |
| Tract 8804.32Will County | 4,726 | $119,595 |
| Tract 8804.28Will County | 4,709 | $125,667 |
| Tract 8804.22Will County | 4,570 | $131,742 |
| Tract 8804.08Will County | 4,528 | $120,394 |
| Tract 8804.25Will County | 4,402 | $128,429 |
| Tract 8804.26Will County | 4,357 | $125,865 |
| Tract 8804.14Will County | 4,287 | $108,849 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Plainfield Township) · Census block assignment files
How does Plainfield Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Plainfield Township is the 68th-most populous of the 16,079 U.S. towns and townships that have one and the 33rd-most populous of 1,407 in Illinois.
Plainfield Township ranks 121st of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 33rd | 1,407 |
| Growth 2020-2025 (PEP) | 76th | 1,347 |
| Residents per square mile | 208th | 1,383 |
| Median household income | 121st | 1,380 |
| Per capita income | 410th | 1,383 |
| Median home value | 213th | 1,379 |
| Median gross rent | 33rd | 1,280 |
| Poverty rate | 987th | 1,119 |
| Bachelor's degree or higher | 277th | 1,369 |
| Median age | 1,238th | 1,383 |
| Owner-occupied share | 227th | 1,382 |
| Work from home | 304th | 1,015 |
| Travel time to work | 150th | 1,382 |
Plainfield Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Plainfield Township with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Plainfield Township?
7 of the 57 figures for Plainfield Township on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Plainfield Township are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.