City profile
Marion, IL
Williamson County · Population 16,836
Marion is a town in Williamson County, IL with about 16,836 residents and a typical home value near $158,000. It is 148 miles from Springfield, IL, which shapes its climate, healthcare access and amenities.
Climate
Climate type
Four seasons
Winter avg
31°F
Summer avg
79°F
Sunny days / yr
190
Home prices & cost of living
Median home price
$158,300
Typical monthly housing
$1,133
Cost of living (100 = U.S.)
85
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 Moderate · county score 86/100
Top hazards: Strong wind, Earthquake, Heat wave
Nearest major airport
105 mi to St. Louis Lambert International Airport (STL)
Political lean (2024 county vote)
Leans Republican · 30% Democratic / 69% Republican
Community
Population
16,836
Black population
8.3%
County
Williamson 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 16,836 residents
- Typical home value about $158,000
- 148 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.