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Market MapIllinoisSaint Clair

Saint Clair County

IllinoisPopulation: 256,791
75
/100
Strong Buy
#51 of 1,000 counties
#37 in Illinois (102 counties)
Analysis by RentalCalcs Research·Independent data + algorithm-driven scoring
Updated July 20, 2026Sources: Zillow ZHVI, Zillow ZORI, US Census ACS, Tax Foundation

Market Snapshot

$180,981
Median Home Price
21% below national median
$1,321/mo
Median Rent
9% below national median
8.76%
Rent-to-Price Ratio
Top 5% nationally
-$89
Est. Monthly Cash Flow
With 20% down at 6.9% rate

Scenario comparison

Same $1,321/mo rent assumption, 20% down, 6.85% rate. What changes is the acquisition price.
ScenarioPurchase priceMonthly cash flowCap rateCash-on-cash
75% of median
value-add or distressed
$135,735+$148/mo7.6%+5.7%
Median
typical MLS deal
$180,981-$89/mo5.7%-2.6%
125% of median
newer / premium
$226,226-$326/mo4.6%-7.5%

Price History

Median Home Price

Median Rent

Historical data from Zillow ZHVI/ZORI

Quick Investment Calculator

20%
5%50%100%

Purchase

Purchase Price$180,981
Down Payment (20%)$36,196
Loan Amount$144,785
Interest Rate6.85%

Monthly Cash Flow

Gross Rent+$1,321
Monthly P&I-$949
Est. Expenses (35%)-$462
Net Cash Flow-$89/mo
5.7%
Cap Rate (all cash)
-2.6%
Cash-on-Cash Return
8.76%
Rent-to-Price Ratio
Negative leverage: At 6.85% rates, borrowing costs exceed the 5.7% cap rate. All-cash buyers may see better returns.

* Based on county median values. 35% expenses include taxes, insurance, maintenance, vacancy, and property management. Actual results vary by property.

Run Full AnalysisTry House Hack Strategy

Score Breakdown

Overall Investment Score
75/100
75
Cash Flow(30%)
88/100

Based on 8.76% rent-to-price ratio. Higher ratios indicate stronger cash flow potential.

Appreciation(25%)
72/100

Based on 2.2% YoY price growth. Moderate growth (3-8%) scores highest.

Stability(25%)
50/100

Population data not available.

Affordability(20%)
91/100

Based on price relative to estimated local incomes.

Scores are calculated using real Zillow home value and rent data, Census population data, and economic indicators. The weighted average produces the overall investment score. Markets with missing rent data use estimated values based on regional averages.

Investment Outlook

Strengths

  • +Above-average rent-to-price ratio (8.76%)
  • +Affordable relative to local incomes
  • +Complete rent data available

Challenges

  • -Negative leverage (cap rate 5.7% < mortgage rate 6.9%)

Economic Indicators

Population
256,791
Median Income
—
Data pending
Unemployment Rate
—
Data pending
Price-to-Income
—
Data pending

Who this market fits

Best for
  • +Value-add operators who can buy below median and force rent up
Skip if
  • −You can't tolerate negative leverage (cap rate below mortgage rate today)

Compare to Nearby Counties

CountyVerdict
McDonoughIL
76$92,986$93712.09%Strong BuyView
ClintonIL
76$212,337Est. pending—Strong BuyView
CurrentSaint ClairIL
75$180,981$1,3218.76%Strong Buy
PikeIL
75$112,450Est. pending—Strong BuyView
ShelbyIL
75$156,256Est. pending—Strong BuyView
WinnebagoIL
75$195,413$1,2127.44%Strong BuyView

The Bottom Line

Strong BuySaint Clair is a strong buy market with excellent fundamentals for buy-and-hold investors.

Saint Clair County in Illinois scores 75/100, ranking #51 of 1,000 US counties (top 6%). At 20% down and current rates, a median-priced rental roughly breaks even on cash flow (8.76% gross rent-to-price ratio). The deal works on appreciation or with better terms, not on month-one cash flow.

Monthly Cash Flow
$-89/mo
Cap Rate
5.7%
Cash-on-Cash
-2.6%

Related markets

Markets like Saint Clair with stronger cash flow

  • McDonough County for cash-flow rentals
  • Winnebago County for cash-flow rentals

Cheaper alternatives to Saint Clair

  • McDonough County, lower entry price
  • Pike County, lower entry price
  • Shelby County, lower entry price

Head-to-head comparisons

  • Saint Clair vs Pike for rentals
  • Saint Clair vs Shelby for rentals
  • Saint Clair vs Winnebago for rentals
All counties in Illinois →

Rent vs buy in Illinois cities

Rent vs buy in Chicago, ILMedian $314,517 · rent $2,113/moRent vs buy in Joliet, ILMedian $361,064 · rent $2,121/moRent vs buy in Rockford, ILMedian $195,413 · rent $1,212/moRent vs buy in Naperville, ILMedian $416,478 · rent $2,040/moRent vs buy in Springfield, ILMedian $186,233 · rent $1,129/moAll Illinois citiesFull rent-vs-buy directory for the state

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