Township · Illinois
Sullivan Township, Livingston County, Illinois
Sullivan Township, Livingston County, township, in Livingston County, Illinois. Sullivan Township, Livingston County had 637 residents on July 1, 2025 by the Census Bureau's estimate, down 2.7% since 2020; the 2020 Census counted 657 and the ACS 2020-2024 5-year estimates put it at 609 (±112). GEOID 1710573482.
Residents, July 2025 estimate
637
Census Bureau estimate (no margin published)
2020 Census count: 657 · ACS 2020-2024: 609 ±112
Median household income
$79,167
±$20,713 (90% margin)
Illinois: $83,390
Median home value
$113,300
±$17,966 (90% margin)
Illinois: $263,300
Median gross rent
$969
±$101 (90% margin)
Illinois: $1,274
Where is Sullivan Township, Livingston County and what county is it in?
Sullivan Township, Livingston County is a township in Livingston County, Illinois. It covers 41.3 square miles of land, 16 residents per square mile in 2020.
One place lies inside Sullivan Township (Livingston County): Cullom (village, 520 in 2020).
Sullivan Township, Livingston County is in the Pontiac, 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 Sullivan Township, Livingston County, and is it growing?
The Census Bureau estimates that 637 people lived in Sullivan Township, Livingston County on July 1, 2025, down 2.7% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 657 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 609 (±112).
| Measure | Sullivan Township, Livingston County | Livingston County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 609±112 | 35,565 | no clear change |
| Households | 276±49 | 14,615 | no clear change |
| Average household size | 2.21±0.21 | 2.29 | no clear change |
| Housing units | 303±51 | 15,930 | −101 |
Sullivan Township, Livingston County's population since 2000
From 738 in 2000 to 637 in 2025: down 13.7%. The 2000, 2010 and 2020 figures are census counts, each for Sullivan Township, Livingston County 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 Sullivan Township, Livingston County?
The median resident of Sullivan Township, Livingston County is 45.8 years old; 18.1% are under 18 and 29.1% are 65 or older. The largest group is non-Hispanic white residents at 88.5%, then Hispanic or Latino residents (of any race) at 7.9%.
| Measure | Sullivan Township, Livingston County | Livingston County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 45.8±16.4 | 41.8 | no clear change |
| Under 18 years | 18.1%±5.8 pts | 21.9% | – |
| 65 years and over | 29.1%±6.7 pts | 20.1% | – |
| Male | 45.0%±5.0 pts | 51.8% | – |
| Hispanic or Latino (any race) | 7.9%±5.9 pts | 5.8% | – |
| White alone, not Hispanic | 88.5%±6.1 pts | 87.7% | no clear change |
| Black or African American alone, not Hispanic | 0.0%±6.0 pts | 3.4% | – |
| Asian alone, not Hispanic | 0.0%±6.0 pts | 0.6% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±6.0 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±6.0 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.6%±2.9 pts | 2.4% | – |
| Some other race alone, not Hispanic | 0.0%±6.0 pts | 0.1% | – |
| Born outside the United States | 0.7%±1.1 pts | 2.4% | – |
| Speak a language other than English at home (age 5+) | 7.8%±6.0 pts | 4.0% | – |
| Civilian veterans (age 18+) | 5.4%±3.6 pts | 7.0% | – |
| With a disability | 15.9%±3.5 pts | 13.6% | – |
| No health insurance coverage | 1.8%±1.6 pts | 5.2% | – |
| High school graduate or higher (age 25+) | 96.4%±2.2 pts | 88.6% | – |
| Bachelor's degree or higher (age 25+) | 17.3%±6.1 pts | 19.0% | no clear change |
| Graduate or professional degree (age 25+) | 4.5%±4.3 pts | 6.0% | – |
| Lived in the same house a year earlier | 92.4%±5.3 pts | 89.9% | – |
| Moved from another state in the past year | 0.3%±0.7 pts | 0.7% | – |
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 Sullivan Township, Livingston County earn?
Half of Sullivan Township, Livingston County's 276 households earn less than $79,167 a year (±$20,713), against $73,790 in Livingston County and $83,390 in Illinois. In 2015-2019 the median was $54,962 in 2024 dollars, so it rose by $24,205 after inflation. 12.0% of residents live below the poverty line.
| Measure | Sullivan Township, Livingston County | Livingston County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $79,167±$20,713 | $73,790 | +$24,205 |
| Mean household income | $97,593±$15,566 | $91,317 | – |
| Per capita income | $41,292±$6,476 | $37,327 | +$13,214 |
| People below the poverty line | 12.0%±6.5 pts | 10.5% | −17.2 pts |
| Children under 18 below the poverty line | 28.2%±16.9 pts | 12.5% | −32.5 pts |
| Households receiving SNAP | 17.8%±7.9 pts | 14.7% | – |
| Households with a computer | 97.1%±2.2 pts | 93.9% | – |
| Households with a broadband subscription | 89.9%±6.1 pts | 88.5% | – |
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 Sullivan Township, Livingston County?
Owners occupy 79.0% of Sullivan Township, Livingston County's occupied homes and renters 21.0%. The median owner-occupied home is valued at $113,300 by its owner (±$17,966). The median renter pays $969 a month including utilities.
| Measure | Sullivan Township, Livingston County | Livingston County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $113,300±$17,966 | $142,200 | no clear change |
| Median gross rent | $969±$101 | $880 | no clear change |
| Renters paying 35% or more of income on rent | 14.7%±15.9 pts | 26.7% | – |
| Median monthly owner costs, with a mortgage | $1,273±$197 | $1,300 | – |
| Owner-occupied homes | 79.0%±9.5 pts | 74.3% | +16.0 pts |
| Renter-occupied homes | 21.0%±9.5 pts | 25.7% | – |
| Housing units | 303±51 | 15,930 | −101 |
| Homeowner vacancy rate | 0.0%±15.7 pts | 0.7% | – |
| Rental vacancy rate | 0.0%±39.5 pts | 7.1% | – |
| Single-family detached homes | 97.0%±3.2 pts | 78.1% | – |
| Mobile homes | 0.0%±11.6 pts | 5.7% | – |
| Built 2020 or later | 0.0%±11.6 pts | 1.1% | – |
| Built 2010 to 2019 | 2.0%±2.6 pts | 3.6% | – |
| Built 1939 or earlier | 38.0%±9.8 pts | 31.4% | – |
| Households with no vehicle | 3.3%±2.5 pts | 5.5% | – |
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 Sullivan Township, Livingston County work and get to work?
87.7% of Sullivan Township, Livingston County's workers drive alone. The average trip to work takes 23.4 minutes.
| Measure | Sullivan Township, Livingston County | Livingston County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 56.5%±8.1 pts | 60.1% | – |
| Unemployment rate | 2.1%±2.5 pts | 3.5% | – |
| Drove alone to work | 87.7%±6.6 pts | 80.4% | – |
| Carpooled | 4.2%±4.0 pts | 7.2% | – |
| Public transportation | 0.0%±12.3 pts | 0.1% | – |
| Walked | 2.1%±2.2 pts | 3.1% | – |
| Worked from home | 3.5%±3.6 pts | 7.0% | – |
| Mean travel time to work | 23.4 min±3.9 | 21.6 min | −11.3 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 Sullivan Township, Livingston County?
No census tract lies mostly in Sullivan Township, Livingston County; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9602Livingston County | 3,215 | $84,191 |
| Tract 9609Livingston County | 2,227 | $83,333 |
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 Sullivan Township, Livingston County) · Census block assignment files
How does Sullivan Township, Livingston County compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Sullivan Township, Livingston County is the 9,302nd-most populous of the 16,079 U.S. towns and townships that have one and the 857th-most populous of 1,407 in Illinois.
Sullivan Township, Livingston County 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 | 857th | 1,407 |
Sullivan Township, Livingston County's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Sullivan Township, Livingston County 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 Sullivan Township, Livingston County?
25 of the 57 figures for Sullivan Township, Livingston County 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 Sullivan Township, Livingston County 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.