RentalCalcs
ToolsMarket MapMy DealsPricingBlog
RentalCalcs

Professional real estate investment calculators to help you analyze deals faster and make confident investment decisions.

Product

  • Tools
  • Market Map
  • Pricing
  • Blog
  • About

Top Markets

  • Harris County, TX
  • Maricopa County, AZ
  • San Diego County, CA
  • Miami-Dade County, FL
  • Dallas County, TX
  • Clark County, NV
  • Browse All Markets →

Legal

  • Terms of Service
  • Privacy Policy
  • Contact

© 2026 RentalCalcs. All rights reserved.

Market MapIllinoisSaint Clair

Saint Clair County

IllinoisPopulation: 256,791St. Louis, MO Metro
78
/100
Strong Buy
#10 of 1,000 counties
#23 in Illinois (102 counties)

Market Snapshot

$171,619
Median Home Price
27% below national median
$1,250/mo
Median Rent
17% below national median
8.74%
Rent-to-Price Ratio
Top 5% nationally
-$87
Est. Monthly Cash Flow
With 20% down at 6.9% rate

Price History

Historical data from Zillow ZHVI/ZORI

Quick Investment Calculator

20%
5%50%100%

Purchase

Purchase Price$171,619
Down Payment (20%)$34,324
Loan Amount$137,295
Interest Rate6.85%

Monthly Cash Flow

Gross Rent+$1,250
Monthly P&I-$900
Est. Expenses (35%)-$438
Net Cash Flow-$87/mo
5.7%
Cap Rate (all cash)
-2.6%
Cash-on-Cash Return
8.74%
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
78/100
78
Cash Flow(30%)
87/100

Based on 8.74% rent-to-price ratio. Higher ratios indicate stronger cash flow potential.

Appreciation(25%)
85/100

Based on 4.7% YoY price growth. Moderate growth (3-8%) scores highest.

Stability(25%)
50/100

Population data not available.

Affordability(20%)
93/100

Price-to-income ratio of 2.5x. Lower ratios indicate more affordable markets.

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 (8.74%)
  • +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
$68,915
vs $57,018 national est.
Unemployment Rate
—
Data pending
Price-to-Income
2.5x
Very affordable

Compare to Nearby Counties

CountyVerdict
RichlandIL
80$132,577Est. pending—Strong BuyView
EdwardsIL
79$124,765Est. pending—Strong BuyView
PeoriaIL
79$154,382$1,1689.08%Strong BuyView
CurrentSaint ClairIL
78$171,619$1,2508.74%Strong Buy
BureauIL
78$142,617Est. pending—Strong BuyView
Rock IslandIL
77$151,597$1,0358.19%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 78/100, ranking #10 of 1,000 US counties (top 1%). The 8.74% rent-to-price ratio exceeds the 1% rule target, suggesting strong cash flow potential.

Monthly Cash Flow
$-87/mo
Cap Rate
5.7%
Cash-on-Cash
-2.6%

Ready to Analyze a Deal in Saint Clair?

Use our investment calculators to run detailed numbers on specific properties.

Single Family1-4 unit rentals, BRRRRHouse HackOwner-occupied strategyMultifamily5+ unit properties
Explore Other Markets