Village · Illinois
Colp, Illinois
Colp, village, in Williamson County, Illinois. Colp had 175 residents on July 1, 2025 by the Census Bureau's estimate, down 1.7% from the Bureau's April 2020 estimates base of 178; the 2020 Census counted 168 on the place as it was defined then and the ACS 2020-2024 5-year estimates put it at 223 (±94). GEOID 1715807.
Residents, July 2025 estimate
175
Census Bureau estimate (no margin published)
2020 Census count: 168 · ACS 2020-2024: 223 ±94
Median household income
not published
Illinois: $83,390
Median home value
$69,300
±$15,547 (90% margin)
Illinois: $263,300
Median gross rent
$100 or less
The survey's top or bottom value; no margin is published
Illinois: $1,274
Where is Colp and what county is it in?
Colp is a village in Williamson County, Illinois. It covers 0.1 square miles of land, 1,254 residents per square mile in 2020.
Colp is in the Marion-Herrin, IL micropolitan statistical area (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 Colp, and is it growing?
The Census Bureau estimates that 175 people lived in Colp on July 1, 2025, down 1.7% since 2020, a steeper fall than Illinois's (−0.8%). The Census Bureau's yearly estimates start from its own April 2020 base for Colp, 178, which differs from the 2020 Census count of 168: the estimates follow the place as the estimates program defines it today (its present boundaries, and for a consolidated city-county the area the program assigns it), so the change since 2020 is measured from that base. The 2020-2024 American Community Survey, a five-year sample, puts the population at 223 (±94).
| Measure | Colp | Williamson County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 223 ±94 | 66,876 | no clear change |
| Households | 104 ±37 | 28,983 | no clear change |
| Average household size | 2.14 ±0.52 | 2.23 | no clear change |
| Housing units | 116 ±37 | 32,084 | no clear change |
Colp's population since 2000
From 224 in 2000 to 175 in 2025: down 21.9%. The 2000, 2010 and 2020 figures are census counts, each for Colp 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 Colp?
The median resident of Colp is 40.7 years old; 21.5% are under 18 and 21.1% are 65 or older. The largest group is non-Hispanic white residents at 61.4%, then non-Hispanic Black residents at 26.9%.
| Measure | Colp | Williamson County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.7 ±17.7 | 41.6 | no clear change |
| Under 18 years | 21.5% ±10.2 pts | 21.3% | – |
| 65 years and over | 21.1% ±13.7 pts | 19.6% | – |
| Male | 53.8% ±8.6 pts | 50.2% | – |
| Hispanic or Latino (any race) | 0.0% ±15.4 pts | 2.9% | – |
| White alone, not Hispanic | 61.4% ±17.2 pts | 87.9% | no clear change |
| Black or African American alone, not Hispanic | 26.9% ±14.3 pts | 4.3% | no clear change |
| Asian alone, not Hispanic | 0.0% ±15.4 pts | 1.4% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±15.4 pts | 0.2% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±15.4 pts | 0.0% | – |
| Two or more races, not Hispanic | 11.7% ±10.0 pts | 3.2% | – |
| Some other race alone, not Hispanic | 0.0% ±15.4 pts | 0.1% | – |
| Born outside the United States | 0.0% ±15.4 pts | 2.0% | – |
| Speak a language other than English at home (age 5+) | 0.0% ±17.3 pts | 3.3% | – |
| Civilian veterans (age 18+) | 11.4% ±7.6 pts | 8.7% | – |
| With a disability | 23.8% ±13.5 pts | 19.1% | – |
| No health insurance coverage | 0.0% ±15.4 pts | 4.6% | – |
| High school graduate or higher (age 25+) | 88.9% ±8.5 pts | 92.8% | – |
| Bachelor's degree or higher (age 25+) | 19.0% ±9.4 pts | 26.2% | – |
| Graduate or professional degree (age 25+) | 9.2% ±6.4 pts | 10.6% | – |
| Lived in the same house a year earlier | 99.6% ±1.1 pts | 87.6% | – |
| Moved from another state in the past year | 0.0% ±15.4 pts | 2.0% | – |
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 Colp earn?
The Census Bureau does not publish a median household income for Colp: too few households were sampled.
| Measure | Colp | Williamson County | Change since 2015-2019 |
|---|---|---|---|
| Mean household income | $60,800 ±$38,576 | $85,846 | – |
| Per capita income | $25,510 ±$11,512 | $37,284 | no clear change |
| People below the poverty line | 47.1% ±18.4 pts | 13.8% | no clear change |
| Children under 18 below the poverty line | 60.4% ±41.4 pts | 17.8% | – |
| Households receiving SNAP | 36.5% ±17.6 pts | 16.6% | – |
| Households with a computer | 84.6% ±17.6 pts | 92.9% | – |
| Households with a broadband subscription | 78.8% ±17.7 pts | 87.6% | – |
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 Colp?
Owners occupy 75.0% of Colp's occupied homes and renters 25.0%. The median owner-occupied home is valued at $69,300 by its owner (±$15,547). The median renter pays $100 or less a month including utilities.
| Measure | Colp | Williamson County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $69,300 ±$15,547 | $156,400 | – |
| Median gross rent | $100 or less | $930 | – |
| Renters paying 35% or more of income on rent | 37.5% ±46.9 pts | 35.2% | – |
| Median monthly owner costs, with a mortgage | $993 ±$284 | $1,374 | – |
| Owner-occupied homes | 75.0% ±14.5 pts | 70.7% | no clear change |
| Renter-occupied homes | 25.0% ±14.5 pts | 29.3% | – |
| Housing units | 116 ±37 | 32,084 | no clear change |
| Homeowner vacancy rate | 0.0% ±35.8 pts | 0.9% | – |
| Rental vacancy rate | 0.0% ±62.5 pts | 5.2% | – |
| Single-family detached homes | 61.2% ±17.4 pts | 74.9% | – |
| Mobile homes | 19.8% ±16.1 pts | 6.8% | – |
| Built 2020 or later | 0.0% ±27.0 pts | 1.3% | – |
| Built 2010 to 2019 | 1.7% ±3.1 pts | 11.2% | – |
| Built 1939 or earlier | 25.0% ±13.4 pts | 14.7% | – |
| Households with no vehicle | 14.4% ±10.9 pts | 6.0% | – |
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 Colp work and get to work?
71.0% of Colp's workers drive alone. The average trip to work takes 30.3 minutes.
| Measure | Colp | Williamson County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 44.0% ±15.3 pts | 58.8% | – |
| Unemployment rate | 11.7% ±13.9 pts | 5.0% | – |
| Drove alone to work | 71.0% ±25.3 pts | 82.1% | – |
| Carpooled | 25.8% ±24.0 pts | 7.2% | – |
| Public transportation | 0.0% ±40.5 pts | 0.3% | – |
| Walked | 0.0% ±40.5 pts | 0.5% | – |
| Worked from home | 3.2% ±6.6 pts | 8.8% | – |
| Mean travel time to work | 30.3 min ±16.1 | 23.5 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 Colp?
No census tract lies mostly in Colp; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 201Williamson County | 3,137 | $52,773 |
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 Colp) · Census block assignment files
How does Colp compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Colp is the 16,892nd-most populous of the 19,476 U.S. incorporated places that have one and the 1,131st-most populous of 1,294 in Illinois.
Colp is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 1,131st | 1,294 |
Colp's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Colp 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 Colp?
25 of the 56 figures for Colp 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 Colp 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' public schools in Colp.