City in Fayette County, Illinois · 8.1 sq mi · 864 people per sq mi
7,041 people live in Vandalia. The typical household earns $45,469, and the median resident is 43.9 years old.
2026 projection
From 7,458 in 2020
Poverty rate 22.22%
Men 41.6 · Women 45.8
1850–2026
7,041
2026 projection
5.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1850–2026
7,041
2026 projection
5.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 7,041 | -67 | 0.94% |
|---|---|---|---|
| 2025 | 7,108 | -58 | 0.81% |
| 2024 | 7,166 | -25 | 0.35% |
| 2023 | 7,191 | -13 | 0.18% |
| 2022 | 7,204 | +157 | 2.23% |
| 2021 | 7,047 | -411 | 5.51% |
| 2020 | 7,458 | +44 | 0.59% |
| 2019 | 7,414 | +61 | 0.83% |
| 2018 | 7,353 | +32 | 0.44% |
| 2017 | 7,321 | +62 | 0.85% |
Showing 10 of 33 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Vandalia has a population change lower than Fayette County, Illinois, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 58 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 5 residents
32% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 32% | 30% | 34% |
| Never married | 43% | 54% | 31% |
| Divorced | 17% | 14% | 21% |
| Widowed | 8% | 2% | 14% |
| Separated | <1% | 1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources