Township · Illinois
Denison Township, Illinois
Denison Township, township, in Lawrence County, Illinois. Denison Township had 1,246 residents on July 1, 2025 by the Census Bureau's estimate, down 8.9% since 2020; the 2020 Census counted 1,344 and the ACS 2020-2024 5-year estimates put it at 1,616 (±321). GEOID 1710119395.
Residents, July 2025 estimate
1,246
Census Bureau estimate (no margin published)
2020 Census count: 1,344 · ACS 2020-2024: 1,616 ±321
Median household income
$70,833
±$10,847 (90% margin)
Illinois: $83,390
Median home value
$126,700
±$20,424 (90% margin)
Illinois: $263,300
Median gross rent
$725
±$455 (90% margin)
Illinois: $1,274
Where is Denison Township and what county is it in?
Denison Township is a township in Lawrence County, Illinois. It covers 57.9 square miles of land, 23 residents per square mile in 2020.
One place lies inside Denison Township: St. Francisville (city, 568 in 2020).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Denison Township, and is it growing?
The Census Bureau estimates that 1,246 people lived in Denison Township on July 1, 2025, down 8.9% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 1,344 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 1,616 (±321).
| Measure | Denison Township | Lawrence County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 1,616±321 | 15,031 | no clear change |
| Households | 498±90 | 5,472 | −137 |
| Average household size | 3.24±0.46 | 2.48 | +1.22 |
| Housing units | 577±107 | 6,407 | −137 |
Denison Township's population since 2000
From 1,714 in 2000 to 1,246 in 2025: down 27.3%. The 2000, 2010 and 2020 figures are census counts, each for Denison 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 Denison Township?
The median resident of Denison Township is 35.0 years old; 23.0% are under 18 and 16.9% are 65 or older. The largest group is non-Hispanic white residents at 85.7%, then non-Hispanic residents of two or more races at 14.3%.
| Measure | Denison Township | Lawrence County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 35.0±11.3 | 40.7 | −15.9 |
| Under 18 years | 23.0%±7.9 pts | 18.6% | – |
| 65 years and over | 16.9%±4.9 pts | 18.5% | – |
| Male | 50.1%±6.2 pts | 56.4% | – |
| Hispanic or Latino (any race) | 0.0%±2.3 pts | 2.1% | – |
| White alone, not Hispanic | 85.7%±9.8 pts | 83.8% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±2.3 pts | 6.2% | – |
| Asian alone, not Hispanic | 0.0%±2.3 pts | 0.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±2.3 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±2.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 14.3%±9.8 pts | 7.3% | – |
| Some other race alone, not Hispanic | 0.0%±2.3 pts | 0.0% | – |
| Born outside the United States | 0.6%±0.6 pts | 1.5% | – |
| Speak a language other than English at home (age 5+) | 1.6%±1.5 pts | 3.0% | – |
| Civilian veterans (age 18+) | 7.6%±3.5 pts | 7.1% | – |
| With a disability | 17.7%±6.8 pts | 20.2% | – |
| No health insurance coverage | 8.4%±7.2 pts | 6.6% | – |
| High school graduate or higher (age 25+) | 87.1%±9.1 pts | 87.0% | – |
| Bachelor's degree or higher (age 25+) | 13.1%±4.1 pts | 14.9% | no clear change |
| Graduate or professional degree (age 25+) | 3.0%±2.2 pts | 5.4% | – |
| Lived in the same house a year earlier | 86.1%±9.7 pts | 86.7% | – |
| Moved from another state in the past year | 3.8%±4.3 pts | 2.3% | – |
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 Denison Township earn?
Half of Denison Township's 498 households earn less than $70,833 a year (±$10,847), against $55,324 in Lawrence County and $83,390 in Illinois. In 2015-2019 it was $56,480 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Denison Township | Lawrence County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $70,833±$10,847 | $55,324 | no clear change |
| Mean household income | $87,503±$13,741 | $79,188 | – |
| Per capita income | $30,095±$4,964 | $31,637 | −$11,141 |
| People below the poverty line | 4.8%±3.9 pts | 14.5% | – |
| Children under 18 below the poverty line | 7.3%±10.3 pts | 19.3% | – |
| Households receiving SNAP | 7.2%±4.5 pts | 14.7% | – |
| Households with a computer | 93.0%±4.6 pts | 94.1% | – |
| Households with a broadband subscription | 89.6%±5.1 pts | 90.3% | – |
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 Denison Township?
Owners occupy 90.4% of Denison Township's occupied homes and renters 9.6%. The median owner-occupied home is valued at $126,700 by its owner (±$20,424). The median renter pays $725 a month including utilities.
| Measure | Denison Township | Lawrence County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $126,700±$20,424 | $99,100 | +$25,660 |
| Median gross rent | $725±$455 | $836 | no clear change |
| Renters paying 35% or more of income on rent | 17.9%±40.2 pts | 14.8% | – |
| Median monthly owner costs, with a mortgage | $1,259±$229 | $1,056 | – |
| Owner-occupied homes | 90.4%±5.1 pts | 71.8% | +10.4 pts |
| Renter-occupied homes | 9.6%±5.1 pts | 28.2% | – |
| Housing units | 577±107 | 6,407 | −137 |
| Homeowner vacancy rate | 0.0%±7.9 pts | 1.7% | – |
| Rental vacancy rate | 12.7%±17.8 pts | 2.8% | – |
| Single-family detached homes | 80.4%±7.4 pts | 74.3% | – |
| Mobile homes | 16.3%±6.2 pts | 17.7% | – |
| Built 2020 or later | 0.5%±0.7 pts | 0.2% | – |
| Built 2010 to 2019 | 9.5%±8.7 pts | 6.4% | – |
| Built 1939 or earlier | 30.0%±7.9 pts | 27.3% | – |
| Households with no vehicle | 4.6%±4.1 pts | 5.7% | – |
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 Denison Township work and get to work?
65.6% of Denison Township's workers drive alone. The average trip to work takes 17.8 minutes.
| Measure | Denison Township | Lawrence County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.9%±9.8 pts | 51.2% | – |
| Unemployment rate | 11.0%±10.9 pts | 8.1% | – |
| Drove alone to work | 65.6%±17.1 pts | 76.1% | – |
| Carpooled | 8.0%±8.4 pts | 10.4% | – |
| Public transportation | 0.0%±5.5 pts | 0.3% | – |
| Walked | 15.2%±17.0 pts | 4.1% | – |
| Worked from home | 8.0%±7.6 pts | 8.4% | – |
| Mean travel time to work | 17.8 min±3.9 | 20.8 min | −8.9 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 Denison Township?
No census tract lies mostly in Denison Township; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 8808Lawrence County | 5,155 | $74,676 |
| Tract 8811Lawrence County | 3,165 | $45,833 |
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 Denison Township) · Census block assignment files
How does Denison Township compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Denison Township is the 6,733rd-most populous of the 16,079 U.S. towns and townships that have one and the 594th-most populous of 1,407 in Illinois.
Denison Township ranks 828th 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 | 594th | 1,407 |
| Growth 2020-2025 (PEP) | 1,343rd | 1,347 |
| Residents per square mile | 1,369th | 1,383 |
| Median household income | 828th | 1,380 |
| Per capita income | 1,167th | 1,383 |
| Median home value | 974th | 1,379 |
| Median gross rent | 1,131st | 1,280 |
| Bachelor's degree or higher | 1,240th | 1,369 |
| Median age | 1,260th | 1,383 |
| Owner-occupied share | 193rd | 1,382 |
| Travel time to work | 1,255th | 1,382 |
Denison Township's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Denison 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 Denison Township?
25 of the 57 figures for Denison 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 Denison 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.