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
What sets Gallatin County apart is where people work — remote work is unusually rare here, at 0.9% versus 14.0% nationally. With 4,857 residents, Gallatin County is a county in Illinois.
Incomes run on the lower side: a median household income of $54,626, below the US median of $78,538. About 10.5% of residents live below the federal poverty level, below the national 12.4%. Home prices sit near the bottom of the range at $84,700, with typical rent around $500.
Fewer adults hold degrees here than in most comparable places — 15.3%, below the national 35.0%. Home-based work is uncommon, at 0.9%, below the national 14.0%, and the average commute runs about 25 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.