City · Illinois
Sullivan, Illinois
Sullivan, city, in Moultrie County, Illinois. Sullivan had 4,310 residents on July 1, 2025 by the Census Bureau's estimate, down 2.2% since 2020; the 2020 Census counted 4,413 and the ACS 2020-2024 5-year estimates put it at 4,348 (±331). GEOID 1773495.
Residents, July 2025 estimate
4,310
Census Bureau estimate (no margin published)
2020 Census count: 4,413 · ACS 2020-2024: 4,348 ±331
Median household income
$63,229
±$9,240 (90% margin)
Illinois: $83,390
Median home value
$102,500
±$18,094 (90% margin)
Illinois: $263,300
Median gross rent
$831
±$105 (90% margin)
Illinois: $1,274
Where is Sullivan and what county is it in?
Sullivan is a city in Moultrie County, Illinois. It covers 2.8 square miles of land, 1,594 residents per square mile in 2020.
Sullivan lies entirely within Sullivan Township (Moultrie County), a township with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Sullivan, and is it growing?
The Census Bureau estimates that 4,310 people lived in Sullivan on July 1, 2025, down 2.2% since 2020, a steeper fall than Illinois's (−0.8%). The 2020 Census counted 4,413 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 4,348 (±331).
| Measure | Sullivan | Moultrie County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 4,348 ±331 | 14,424 | no clear change |
| Households | 1,836 ±134 | 5,817 | no clear change |
| Average household size | 2.25 ±0.18 | 2.42 | no clear change |
| Housing units | 1,898 ±128 | 6,240 | −234 |
Sullivan's population since 2000
From 4,326 in 2000 to 4,310 in 2025: down 0.4%. The 2000, 2010 and 2020 figures are census counts, each for Sullivan 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?
The median resident of Sullivan is 38.1 years old; 24.8% are under 18 and 17.5% are 65 or older. The largest group is non-Hispanic white residents at 95.2%, then non-Hispanic Black residents at 2.2%.
| Measure | Sullivan | Moultrie County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.1 ±3.0 | 40.1 | no clear change |
| Under 18 years | 24.8% ±4.7 pts | 25.2% | – |
| 65 years and over | 17.5% ±2.5 pts | 19.0% | – |
| Male | 47.7% ±2.8 pts | 49.6% | – |
| Hispanic or Latino (any race) | 0.9% ±1.1 pts | 1.7% | – |
| White alone, not Hispanic | 95.2% ±2.1 pts | 95.1% | no clear change |
| Black or African American alone, not Hispanic | 2.2% ±1.9 pts | 1.0% | – |
| Asian alone, not Hispanic | 0.0% ±0.9 pts | 0.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.9 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.7% ±1.3 pts | 2.1% | – |
| Some other race alone, not Hispanic | 0.0% ±0.9 pts | 0.1% | – |
| Born outside the United States | 0.3% ±0.4 pts | 0.7% | – |
| Speak a language other than English at home (age 5+) | 1.5% ±2.1 pts | 10.9% | – |
| Civilian veterans (age 18+) | 8.1% ±3.5 pts | 6.5% | – |
| With a disability | 16.4% ±4.0 pts | 13.1% | – |
| No health insurance coverage | 6.6% ±4.0 pts | 14.1% | no clear change |
| High school graduate or higher (age 25+) | 90.2% ±3.4 pts | 85.6% | – |
| Bachelor's degree or higher (age 25+) | 15.9% ±4.4 pts | 19.0% | no clear change |
| Graduate or professional degree (age 25+) | 7.5% ±3.5 pts | 6.7% | – |
| Lived in the same house a year earlier | 79.1% ±9.1 pts | 89.7% | – |
| Moved from another state in the past year | 0.3% ±0.4 pts | 0.3% | – |
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 Sullivan earn?
Half of Sullivan's 1,836 households earn less than $63,229 a year (±$9,240), against $71,784 in Moultrie County and $83,390 in Illinois. In 2015-2019 it was $69,380 in 2024 dollars; the margins of error cannot tell the two periods apart. 10.3% of residents live below the poverty line.
| Measure | Sullivan | Moultrie County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $63,229 ±$9,240 | $71,784 | no clear change |
| Mean household income | $79,739 ±$14,855 | $90,465 | – |
| Per capita income | $34,605 ±$6,638 | $37,035 | no clear change |
| People below the poverty line | 10.3% ±4.1 pts | 9.2% | no clear change |
| Children under 18 below the poverty line | 7.6% ±6.7 pts | 10.6% | – |
| Households receiving SNAP | 17.8% ±5.4 pts | 11.8% | – |
| Households with a computer | 96.2% ±2.4 pts | 90.1% | – |
| Households with a broadband subscription | 87.8% ±4.6 pts | 82.6% | – |
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 Sullivan?
Owners occupy 68.6% of Sullivan's occupied homes and renters 31.4%. The median owner-occupied home is valued at $102,500 by its owner (±$18,094). The median renter pays $831 a month including utilities, and 30.9% of renters pay 35% or more of their income on rent.
| Measure | Sullivan | Moultrie County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $102,500 ±$18,094 | $134,000 | no clear change |
| Median gross rent | $831 ±$105 | $804 | no clear change |
| Renters paying 35% or more of income on rent | 30.9% ±13.9 pts | 21.2% | no clear change |
| Median monthly owner costs, with a mortgage | $1,059 ±$189 | $1,248 | – |
| Owner-occupied homes | 68.6% ±8.3 pts | 76.0% | no clear change |
| Renter-occupied homes | 31.4% ±8.3 pts | 24.0% | – |
| Housing units | 1,898 ±128 | 6,240 | −234 |
| Homeowner vacancy rate | 0.0% ±2.9 pts | 0.2% | – |
| Rental vacancy rate | 3.4% ±5.8 pts | 6.7% | – |
| Single-family detached homes | 73.8% ±6.5 pts | 84.8% | – |
| Mobile homes | 11.5% ±5.1 pts | 5.5% | – |
| Built 2020 or later | 0.0% ±2.0 pts | 0.9% | – |
| Built 2010 to 2019 | 3.3% ±3.1 pts | 3.1% | – |
| Built 1939 or earlier | 32.3% ±7.4 pts | 25.8% | – |
| Households with no vehicle | 12.6% ±6.0 pts | 13.3% | – |
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 many new homes is Sullivan building?
Builders took permits for 13 new housing units in Sullivan in 2025 (3 in single-family houses), 3.0 per 1,000 residents against 1.5 across Illinois.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Sullivan work and get to work?
75.2% of Sullivan's workers drive alone. The average trip to work takes 16.3 minutes.
| Measure | Sullivan | Moultrie County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.4% ±4.3 pts | 60.2% | – |
| Unemployment rate | 2.4% ±2.4 pts | 2.2% | – |
| Drove alone to work | 75.2% ±7.2 pts | 73.6% | – |
| Carpooled | 12.2% ±5.3 pts | 10.8% | – |
| Public transportation | 0.8% ±0.9 pts | 0.6% | – |
| Walked | 10.1% ±5.7 pts | 5.5% | – |
| Worked from home | 1.7% ±1.6 pts | 5.3% | – |
| Mean travel time to work | 16.3 min ±3.0 | 20.9 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 Sullivan?
1 census tract lies mostly in Sullivan, and 2 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9772Moultrie County | 4,208 | $62,587 |
| Tract 9771Moultrie County | 2,963 | $77,431 |
| Tract 9769Moultrie County | 4,730 | $96,747 |
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) · Census block assignment files
How does Sullivan compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, Sullivan is the 5,323rd-most populous of the 19,476 U.S. incorporated places that have one and the 359th-most populous of 1,294 in Illinois.
Sullivan ranks 1,006th 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 | 359th | 1,294 |
| Growth 2020-2025 (PEP) | 733rd | 1,347 |
| Residents per square mile | 399th | 1,383 |
| Median household income | 1,006th | 1,380 |
| Per capita income | 914th | 1,383 |
| Median home value | 1,161st | 1,379 |
| Median gross rent | 897th | 1,280 |
| Poverty rate | 543rd | 1,119 |
| Bachelor's degree or higher | 1,117th | 1,369 |
| Median age | 1,035th | 1,383 |
| Owner-occupied share | 1,081st | 1,382 |
| Travel time to work | 1,319th | 1,382 |
Sullivan's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare Sullivan 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?
18 of the 57 figures for Sullivan 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 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 Sullivan.