Gallatin County's 2026 population is estimated at 4,654, reflecting a -0.39% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Gallatin County is the 98th largest county in Illinois. The 2010 population was 5,574 and has grown -16.51% since 2010.
Data after 2023 is projected based on recent change
Overall: 46.7 years
Female: 48.7 years
Male: 45.1 years
There are 3,833 adults, (1,217 of whom are seniors) in Gallatin County.
Female: 2,391 (49.6%)
Male: 2,428 (50.4%)
The racial composition of Gallatin County includes 96.18% White, and smaller percentages for Two or more races, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 4,635 | 96.18% |
| Two or more races | 87 | 1.81% |
| Black or African American | 54 | 1.12% |
| Asian | 37 | 0.77% |
| Native American | 6 | 0.12% |
Gallatin County 's average per capita income is $43,042. Household income levels show a median of $59,219. The poverty rate stands at 13.58%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,128 | - |
| Families | $75,345 | $95,343 |
| Households | $59,219 | $77,408 |
| Non Families | $34,524 | $43,796 |
Average Income
Median Household Income
Poverty Rate