Housing decision brief
St. Clair County, IL Housing Market
St. Clair County screens as a higher purchase price, rent that needs comparison, a higher tax-rate signal market. Use the page as a decision brief, not just a price lookup, because local income, taxes, and data confidence change how affordable the county really is.
79th lowest home value out of 102 Illinois counties with data | 92nd lowest rent out of 102
Median home value
$168,800
Purchase-price signal from Census ACS.
Median rent
$1,032/mo
Gross rent, including utilities where reported.
Monthly owner cost
$1,154/mo
Owner costs before individual loan terms.
Decision snapshot
Read this county in four signals.
Buy screen
2.4x
Median home value divided by local household income.
Rent burden
28.0%
Below 30% usually screens as less pressured.
Rent vs own
$122/mo
Median rent screens below owner cost.
Data confidence
1 note
Crime coverage is partial, so safety comparisons need source context.
What Works
Rent burden below pressure line
28.00% of renter income goes to rent, below the 30% burden threshold.
What to Check
Tax rate needs attention
2.09% effective property-tax rate is 5% above Illinois county median
Crime data coverage
Crime data coverage is partial. Treat zero or low crime rates as incomplete until you check the source coverage.
Best Fit For
- Buyers comparing homes to local incomes
Poor Fit For
- Buyers focused only on purchase price and ignoring annual property tax
- Anyone treating reported crime rates as complete without source context
County vs State vs National
The county number only matters after you see the benchmark. These comparisons show where St. Clair County is genuinely cheap, where it is average, and where the hidden cost may be.
| Metric | County | State | U.S. | Signal |
|---|---|---|---|---|
Median home value Lower usually helps affordability. | $168,800 | $126,000 | $281,900 | 34% pressure34% above Illinois county median |
Median gross rent Lower usually helps affordability. | $1,032 | $793 | $1,163 | 30% pressure30% above Illinois county median |
Monthly owner cost Lower usually helps affordability. | $1,154 | $853 | $1,672 | 35% pressure35% above Illinois county median |
Median household income | $70,178 | $65,189 | $74,755 | 8% favorable8% above Illinois county median |
Effective property-tax rate Lower usually helps affordability. | 2.09% | 2.00% | 1.02% | 5% pressure5% above Illinois county median |
Rent burden Lower usually helps affordability. | 28.00% | 26.00% | N/A | 8% pressure28.00% of renter income goes to rent. |
Income Fit
A low price only helps if local income can carry the monthly cost. This panel compares the county income base with rent and owner-cost thresholds.
Rent cushion
+$28,898
Median income minus rent threshold.
Owner cushion
+$20,721
Median income minus owner-cost threshold.
Affordability Advisory
This turns the raw housing numbers into income and buy-versus-rent screens.
Affordability verdict
St. Clair County is affordable for renters, with a median gross rent of $1,032/month representing approximately 17.6% of median household income. The rent burden (GRAPI) stands at 28.0%.
Rent vs own
Renters in St. Clair County pay $1,032/month on average, compared to $1,154/month for homeowners. This market favors renters by about 11%.
Income needed
To afford the median rent without exceeding 30% of gross income, a household needs to earn approximately $41,280/year. For owner costs at the 28% rule, the required income is roughly $49,457/year. With a median household income of $70,178, most households can comfortably afford rent here. Notably, 28.0% of renter households in St. Clair County are cost-burdened, spending more than 30% of income on housing.
Regional context
Compared to Madison County where rent averages $969/month, St. Clair County is approximately 7% more expensive.
Better Counties to Compare
Similar counties are matched on home value, rent, income, and state context. This is more useful than a simple nearest-price list.
| County | Home Value | Rent | Why compare |
|---|---|---|---|
| Madison County, IL | $167,900 | $969/mo | Same-state comparison near $167,900 home value and $969/mo rent. |
| Sangamon County, IL | $170,300 | $954/mo | Same-state comparison near $170,300 home value and $954/mo rent. |
| Kankakee County, IL | $185,700 | $1,075/mo | Same-state comparison near $185,700 home value and $1,075/mo rent. |
| Winnebago County, IL | $155,100 | $986/mo | Same-state comparison near $155,100 home value and $986/mo rent. |
| LaSalle County, IL | $154,900 | $906/mo | Same-state comparison near $154,900 home value and $906/mo rent. |
Data Confidence
- Crime coverage is partial, so safety comparisons need source context.
Next Checks
Housing Questions for St. Clair County
Is St. Clair County affordable for buying a home?
Is renting or owning cheaper in St. Clair County?
How much income do you need for housing in St. Clair County?
What should I double-check before moving to St. Clair County?
Data: U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2019-2023) — Informational only. Not financial or legal advice.