Township · Illinois
Capital Township, Illinois
Capital Township, township, in Sangamon County, Illinois. Capital Township had 111,143 residents on July 1, 2025 by the Census Bureau's estimate, down 1.4% since 2020; the 2020 Census counted 112,219 and the ACS 2020-2024 5-year estimates put it at 111,650 (±74). GEOID 1716711046.
Residents, July 2025 estimate
111,143
Census Bureau estimate (no margin published)
2020 Census count: 112,219 · ACS 2020-2024: 111,650 ±74
Median household income
$65,902
±$3,357 (90% margin)
Illinois: $83,390
Median home value
$162,800
±$4,236 (90% margin)
Illinois: $263,300
Median gross rent
$975
±$21 (90% margin)
Illinois: $1,274
Where is Capital Township and what county is it in?
Capital Township is a township in Sangamon County, Illinois. It covers 59.5 square miles of land, 1,886 residents per square mile in 2020.
One place lies inside Capital Township: Springfield (city, 114,394 in 2020).
Capital Township is in the Springfield, IL metropolitan statistical area, which takes in 2 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 Capital Township, and is it growing?
The Census Bureau estimates that 111,143 people lived in Capital Township on July 1, 2025, down 1.4% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 112,219 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 111,650 (±74).
| Measure | Capital Township | Sangamon County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 111,650±74 | 194,947 | −3,869 |
| Households | 50,244±793 | 84,762 | no clear change |
| Average household size | 2.15±0.03 | 2.25 | −0.05 |
| Housing units | 56,533±630 | 93,382 | no clear change |
Capital Township's population since 2000
From 111,471 in 2000 to 111,143 in 2025: down 0.3%. The 2000, 2010 and 2020 figures are census counts, each for Capital 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 Capital Township?
The median resident of Capital Township is 41.0 years old; 20.7% are under 18 and 19.9% are 65 or older. The largest group is non-Hispanic white residents at 69.0%, then non-Hispanic Black residents at 19.3%. 4.9% of residents were born outside the United States.
| Measure | Capital Township | Sangamon County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.0±0.6 | 41.0 | +1.6 |
| Under 18 years | 20.7%±0.7 pts | 21.9% | – |
| 65 years and over | 19.9%±0.5 pts | 19.4% | – |
| Male | 48.3%±0.6 pts | 48.3% | – |
| Hispanic or Latino (any race) | 3.4%±0.4 pts | 2.9% | +0.6 pts |
| White alone, not Hispanic | 69.0%±0.9 pts | 77.3% | −2.1 pts |
| Black or African American alone, not Hispanic | 19.3%±1.0 pts | 12.5% | no clear change |
| Asian alone, not Hispanic | 3.1%±0.4 pts | 2.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±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 | 4.4%±0.7 pts | 4.3% | – |
| Some other race alone, not Hispanic | 0.8%±0.6 pts | 0.5% | – |
| Born outside the United States | 4.9%±0.6 pts | 3.6% | no clear change |
| Speak a language other than English at home (age 5+) | 6.1%±0.6 pts | 4.8% | – |
| Civilian veterans (age 18+) | 6.5%±0.6 pts | 6.6% | – |
| With a disability | 15.0%±0.9 pts | 13.6% | – |
| No health insurance coverage | 4.2%±0.6 pts | 3.6% | no clear change |
| High school graduate or higher (age 25+) | 93.3%±0.7 pts | 94.1% | – |
| Bachelor's degree or higher (age 25+) | 36.3%±1.4 pts | 36.6% | no clear change |
| Graduate or professional degree (age 25+) | 15.6%±1.0 pts | 14.8% | – |
| Lived in the same house a year earlier | 87.1%±1.0 pts | 89.4% | – |
| Moved from another state in the past year | 1.4%±0.3 pts | 1.2% | – |
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 Capital Township earn?
Half of Capital Township's 50,244 households earn less than $65,902 a year (±$3,357), against $75,357 in Sangamon County and $83,390 in Illinois. In 2015-2019 it was $67,243 in 2024 dollars; the margins of error cannot tell the two periods apart. 16.9% of residents live below the poverty line.
| Measure | Capital Township | Sangamon County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $65,902±$3,357 | $75,357 | no clear change |
| Mean household income | $92,588±$3,245 | $100,226 | – |
| Per capita income | $42,492±$1,361 | $44,151 | no clear change |
| People below the poverty line | 16.9%±1.6 pts | 13.1% | no clear change |
| Children under 18 below the poverty line | 24.4%±3.9 pts | 17.8% | −5.3 pts |
| Households receiving SNAP | 19.3%±1.4 pts | 15.5% | – |
| Households with a computer | 94.6%±0.9 pts | 95.4% | – |
| Households with a broadband subscription | 90.1%±1.4 pts | 90.6% | – |
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 Capital Township?
Owners occupy 63.9% of Capital Township's occupied homes and renters 36.1%. The median owner-occupied home is valued at $162,800 by its owner (±$4,236). The median renter pays $975 a month including utilities, and 38.5% of renters pay 35% or more of their income on rent.
| Measure | Capital Township | Sangamon County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $162,800±$4,236 | $176,300 | no clear change |
| Median gross rent | $975±$21 | $983 | no clear change |
| Renters paying 35% or more of income on rent | 38.5%±3.0 pts | 37.1% | no clear change |
| Median monthly owner costs, with a mortgage | $1,400±$36 | $1,494 | – |
| Owner-occupied homes | 63.9%±1.7 pts | 71.3% | +2.5 pts |
| Renter-occupied homes | 36.1%±1.7 pts | 28.7% | – |
| Housing units | 56,533±630 | 93,382 | no clear change |
| Homeowner vacancy rate | 1.3%±0.5 pts | 1.0% | – |
| Rental vacancy rate | 11.8%±1.9 pts | 10.9% | – |
| Single-family detached homes | 64.4%±1.3 pts | 72.5% | – |
| Mobile homes | 3.4%±0.6 pts | 3.9% | – |
| Built 2020 or later | 0.4%±0.2 pts | 0.4% | – |
| Built 2010 to 2019 | 4.5%±0.5 pts | 5.9% | – |
| Built 1939 or earlier | 17.8%±0.9 pts | 15.5% | – |
| Households with no vehicle | 10.4%±1.2 pts | 7.6% | – |
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 Capital Township work and get to work?
74.8% of Capital Township's workers drive alone and 14.4% work from home. The average trip to work takes 17.4 minutes. The unemployment rate in 2020-2024 averaged 6.8%.
| Measure | Capital Township | Sangamon County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.8%±1.6 pts | 61.2% | – |
| Unemployment rate | 6.8%±0.9 pts | 5.4% | no clear change |
| Drove alone to work | 74.8%±1.8 pts | 77.1% | – |
| Carpooled | 6.1%±1.0 pts | 5.6% | – |
| Public transportation | 1.4%±0.4 pts | 0.9% | – |
| Walked | 1.7%±0.5 pts | 1.4% | – |
| Worked from home | 14.4%±1.6 pts | 13.7% | +10.5 pts |
| Mean travel time to work | 17.4 min±0.7 | 19.7 min | no clear change |
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 Capital Township?
34 census tracts lie mostly in Capital Township, and 12 more reach into it (2020 census blocks). Their median household incomes run from $21,358 (Tract 9) to $117,950 (Tract 31).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 29Sangamon County | 5,268 | $92,661 |
| Tract 36.04Sangamon County | 5,599 | $89,280 |
| Tract 10.04Sangamon County | 4,717 | $55,070 |
| Tract 30Sangamon County | 5,913 | $63,039 |
| Tract 31Sangamon County | 7,742 | $117,950 |
| Tract 25Sangamon County | 5,905 | $54,250 |
| Tract 22Sangamon County | 3,315 | $68,750 |
| Tract 20.01Sangamon County | 3,959 | $110,725 |
| Tract 19Sangamon County | 3,132 | $52,231 |
| Tract 12Sangamon County | 3,105 | $75,625 |
| Tract 5.03Sangamon County | 3,072 | $50,449 |
| Tract 36.03Sangamon County | 5,846 | $151,212 |
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 Capital Township) · Census block assignment files
How does Capital Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Capital Township is the 33rd-most populous of the 16,079 U.S. towns and townships that have one and the 15th-most populous of 1,407 in Illinois.
Capital Township ranks 949th 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 | 15th | 1,407 |
| Growth 2020-2025 (PEP) | 528th | 1,347 |
| Residents per square mile | 310th | 1,383 |
| Median household income | 949th | 1,380 |
| Per capita income | 501st | 1,383 |
| Median home value | 730th | 1,379 |
| Median gross rent | 603rd | 1,280 |
| Poverty rate | 211th | 1,119 |
| Bachelor's degree or higher | 329th | 1,369 |
| Median age | 689th | 1,383 |
| Owner-occupied share | 1,212th | 1,382 |
| Work from home | 320th | 1,015 |
| Travel time to work | 1,271st | 1,382 |
Capital Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Capital 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 Capital Township?
3 of the 57 figures for Capital 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 Capital 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.