Gallatin County, Illinois Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Gallatin County, IL Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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C
Health Below averageAmong the 3 least healthy counties in Illinois
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C
Income Below average
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F
Education Well below averageAmong the 5 least educated counties in Illinois
Source: Map AI Methodology
Population: density and quick facts
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Population | 4,818 | 12,692,444 | 337,468,954 |
| Population density (per sq mi) | 14.7 | 219.1 | 86.4 |
| Population growth (%/yr) | -1.25% | -0.16% | 0.59% |
| Median age | 48.5 | 37.4 | 37.3 |
| Households | 2,098 | 5,035,584 | 130,235,071 |
Population in Gallatin County declined by 18.7% from 2009 to 2024, reaching 4,818 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Gallatin County is Boomers, aged 61–79, at 23.8% of residents. That is 6.8 points above Illinois as a whole.
- Gen Z 13–28 826 17.2% -4.1 pts
- Millennials 29–44 876 18.2% -3.7 pts
- Gen X 45–60 1,026 21.3% +0.9 pts
- Boomers 61–79 1,145 23.8% +6.8 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Illinois, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.8% of the people living in Gallatin County and men 49.2%.
- Women 50.8% Illinois 50.6%
- Men 49.2% Illinois 49.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Gallatin County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Gallatin County has a the economy index of C, which means it is somewhat prosperous.
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median household income | $59,349 | $84,042 | $80,455 |
| Income growth (%/yr) | 4.70% | 4.46% | 4.80% |
| Unemployment rate | 9.2% | 5.8% | 5.2% |
The median household income in Gallatin County is about 29% lower than in Illinois.
Housing
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Median home price | $82,500 | $149,936 | $248,835 |
| Median rent | $540 | $1,274 | $1,407 |
| Homeownership rate | 77.4% | 67.1% | 65.2% |
The median home price in Gallatin County is about 12.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $540 per month for that long.
Commute Time & Mobility
Commuters in Gallatin County spend about 44 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 181 hours, about 7.6 full days, spent commuting.
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 21.8 | 23.6 | 22.4 |
| Round-trip commute (min) | 43.5 | 47.3 | 44.8 |
| Yearly time spent (hours) | 181 | 197 | 187 |
| Estimated yearly cost | $5,623 | $6,104 | $5,790 |
| Work from home | 2.2% | 15.9% | 15.0% |
| Highway traffic (vehicles/day) | 1,268 | 7,977 | 8,813 |
| Local road traffic (vehicles/day) | 294 | 1,547 | 1,355 |
Fastest commutes among counties in
Illinois:
Edgar County (12.0 min), Brown County (12.7 min), Morgan County (13.1 min).
Slowest:
Calhoun County (43.8 min), Pulaski County (31.2 min), Pope County (31.0 min).
The average commute time in Gallatin County is 22 minutes, shorter than the 24 minutes in Illinois.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Gallatin County has a education index of F, which means it scores poorly in education.
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 11.4% | 34.1% | 31.6% |
| Average household size | 2.28 | 2.46 | 2.53 |
Highest education index among counties in
Illinois:
DuPage County (0.4), Champaign County (0.4), Lake County (0.4).
Lowest:
Hardin County (0.2), Fayette County (0.2), Perry County (0.2).
Health
Gallatin County has a health index of C, which means it is somewhat healthy.
| Metric | Gallatin County | Illinois Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 73.7 | 77.9 | 78.3 |
| Self-rated poor health | 19.1% | 15.6% | 16.3% |
| Smokers | 22.4% | 19.2% | 19.0% |
Highest health index among counties in
Illinois:
DuPage County (0.8), Champaign County (0.8), Monroe County (0.8).
Lowest:
Alexander County (0.8), Pulaski County (0.8), Gallatin County (0.8).
Gallatin County, IL Compared With Nearby Counties
How Gallatin County, IL compares with the 1 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Gallatin County, IL | 4,818 | $59,349 #1/2 | $82,500 #1/2 | 21.8 min #2/2 |
| Saline County, IL | 23,213 | $53,513 | $57,217 | 17.4 min |
Frequently Asked Questions
Common questions about Gallatin County, Illinois.
How many people live in Gallatin County, Illinois?
About 4,818 people live in Gallatin County, Illinois, in 2,098 households of 2.3 people on average. The median age is 48.5, so residents are older than the U.S. median of 37.3 by about 11 years.
Is Gallatin County, Illinois mostly urban or rural?
Averaged over its land area, Gallatin County, Illinois has 15 people per square mile, a density typical of rural areas. That is about 17% of the U.S. average of 86.
How affordable is housing in Gallatin County, Illinois?
The median home costs 1.4 times the median household income ($82,500 against $59,349), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $540 a month takes about 11% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Gallatin County, Illinois?
Unemployment in Gallatin County, Illinois is 9.2%, well above the U.S. rate of 5.2%, so job seekers may face more competition than elsewhere.
How common is a college degree in Gallatin County, Illinois?
11.4% of adults in Gallatin County, Illinois hold a bachelor's degree or higher (about 1 in 9), well below the U.S. share of 31.6%.
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