Gallatin County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 98th-largest in Illinois
The population of Gallatin County, Illinois is 4,857 as of the 2023 American Community Survey, making it the 98th-largest county in Illinois. The median household income is $54,626, the median home value is $84,700, and the median age is 47.3.
The population of Gallatin County has declined 15.9% since 2010 (5,574 → 4,690), a -1.23% annualized rate.
4,857
Population
-1.23%
Annual growth
15
People / sq mi
$54,626
Median Income
$84,700
Median Home Value
Gallatin County covers 323 sq mi of land at 15.0 people per square mile.
About Gallatin County, IL
Gallatin County is a county in Illinois with a population of 4,857. It ranks #98 among counties in Illinois by population. The median age is 47.3, older than the national median. The population is 50.0% male and 50.0% female.
The median household income in Gallatin County is $54,626, below the US median of $74,580. 10.5% of residents live below the federal poverty level. Home values sit at a median of $84,700, with monthly rent averaging $500. The homeownership rate of 80.4% is higher than the national rate of 64.8%.
Educational attainment in Gallatin County reflects 15.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 0.9% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 25.3 minutes each way.
Gallatin County Population History (2010-2024)
The county of Gallatin County had a population of 5,574 in 2010 and 4,690 in 2024, a -15.9% growth over 14 years. The peak was 5,574 in 2010. Average annual growth rate: -1.22%.
4,690
Population (2024)
5,574
Population (2010)
5,574
Peak (2010)
-1.22%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 5,574 |
| 2011 | 5,490 |
| 2012 | 5,391 |
| 2013 | 5,387 |
| 2014 | 5,279 |
| 2015 | 5,224 |
| 2016 | 5,165 |
| 2017 | 5,073 |
| 2018 | 5,049 |
| 2019 | 4,833 |
| 2020 | 4,945 |
| 2021 | 4,908 |
| 2022 | 4,842 |
| 2023 | 4,708 |
| 2024 | 4,690 |
Race & Ethnicity
| White | 96.1% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.7% |
| Two or More Races | 0.0% |
Age & Sex
47.3
Median Age
50.0%
Female
50.0%
Male
25.6%
Age 65+
Age Distribution
Children (under 15): 16.3% · Seniors (65+): 25.6%
Income & Poverty
| Median household income | $54,626$-27,076 vs state |
| Mean household income | $88,438 |
| Per-capita income | $39,976 |
| Poverty rate | 10.5%+2.3% vs state |
| Unemployment rate | 4.2% |
| Employment-to-population | 53.5% |
Top Industries by Employment
The largest employment sector in Gallatin County is professional & business services, accounting for 24.3% of workers.
How residents commute
0.0%
Drive alone
0.1%
Carpool
90.3%
Public transit
0.9%
Work from home
25.3 min
Avg commute
Housing
$84,700$-165,800 vs state
Median home value
$500
Median rent
80.4%
Homeownership rate
2,506
Total housing units
83.6%
Occupied
16.4%
Vacant
19.6%
Renter-occupied
Social & access
96.1%
With health insurance
82.7%
With broadband internet
32.4%
Foreign-born
7.7%
Veterans (18+)
25.3%
With a disability
99.1%
Speak language other than English at home
Education
86.4%
High School+
15.3%
Bachelor's+
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County rankings
Frequently Asked Questions
Gallatin County, Illinois has a population of 4,857 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 98th-largest county in Illinois. Population density is 15 people per square mile.
The population of Gallatin County has declined 15.9% since 2010 (5,574 → 4,690), a -1.23% annualized rate.
The median household income in Gallatin County, Illinois is $54,626, with mean (average) household income of $88,438 and per-capita income of $39,976. 10.5% of residents live below the federal poverty level.
In Gallatin County, the largest racial and ethnic groups are White (96.1%), Hispanic or Latino (2.7%), Black or African American (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Gallatin County, Illinois is 47.3 years. Residents are 50.0% female and 50.0% male.
The median home value in Gallatin County is $84,700 and median monthly rent is $500. 80.4% of occupied housing units are owner-occupied. The county has 2,506 total housing units, 16.4% of which are vacant.
The largest employment sector in Gallatin County, Illinois is professional, scientific, and management services, employing 24.3% of workers. The unemployment rate is 4.2%.
Chicago is among the largest cities associated with Gallatin County, Illinois, with a population of 2,707,648.
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Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.