City profile
Mount Vernon, IL
Jefferson County · Population 14,090
Mount Vernon is a town in Jefferson County, IL with about 14,090 residents and a typical home value near $100,000. It is 110 miles from Springfield, IL, which shapes its climate, healthcare access and amenities.
Climate
Climate type
Four seasons
Winter avg
30°F
Summer avg
78°F
Sunny days / yr
190
Home prices & cost of living
Median home price
$99,800
Typical monthly housing
$714
Cost of living (100 = U.S.)
72
Taxes
- Property tax
- 2.07%
- State income tax (top)
- 4.95%
- Social Security
- Not taxed
- Pensions
- Not taxed
- Sales tax (state + avg. local)
- 8.86%
FEMA natural hazard risk
Relatively Low · county score 77/100
Top hazards: Earthquake, Strong wind, Winter weather
Nearest major airport
84 mi to St. Louis Lambert International Airport (STL)
Political lean (2024 county vote)
Leans Republican · 26% Democratic / 73% Republican
Community
Population
14,090
Black population
11.9%
County
Jefferson County
Detailed crime figures are available for our 201 hand-researched cities.
2025–2026 trends
2026 market trends
- ▸More retirees are leaving IL than arriving, mostly over cost
- ▸Home prices are still rising in 2026 — good for long-term value, less room to negotiate
- ▸Climate/cost risks to check: severe storms
Highlights
- About 14,090 residents
- Typical home value about $100,000
- 110 miles from Springfield, IL
Trade-offs
- Smaller community with fewer local amenities
- Scores for this place are estimated from Census data and the nearest major city
Figures are estimates from public sources (see How we match). Verify before making decisions.