Brown County

IllinoisPopulation: 6,334
76
/100
Strong Buy
#40 of 1,000 counties
#32 in Illinois (102 counties)
Analysis by RentalCalcs ResearchIndependent data + algorithm-driven scoring
Updated August 8, 2026Sources: Zillow ZHVI, Zillow ZORI, US Census ACS, Tax Foundation

Market Snapshot

$157,116
Median Home Price
31% below national median
$9,493/mo
Est. Rent
Based on regional data
6.04%
Rent-to-Price Ratio
Estimated from price data
+$0
Est. Monthly Cash Flow
With 20% down at 6.9% rate

Brown market analysis

Brown County, Illinois sits at a median home price of $157,116 with year-over-year appreciation of 3.08% and an affordability index of 96, meaning it's about as accessible an entry point as you'll find anywhere. The scoring tells the real story, though: an appreciation score of 80 paired with a cash flow score of 0 places this squarely in the appreciation camp, not the cash flow camp. No cap rate, no estimated monthly cash flow, and no rent-to-price ratio are provided in the data, which in itself is a signal that rental income here is not the engine driving the investment case. Investors expecting yield from day one should read that carefully before underwriting a position.

The profile here suits an appreciation-oriented buyer who is comfortable holding a low-cost asset in a rural Illinois market and capturing steady, if modest, price gains. The 3.08% annual price growth on a $157,116 asset is not dramatic in absolute dollar terms, roughly $4,800 in year-one appreciation at that rate, but when your entry is this affordable, the percentage return on a $31,423 down payment from price appreciation alone starts to look more interesting. That said, the cash flow score of 0 means this is not a market for investors who need the property to carry itself. A value-add operator looking to force appreciation through renovation might find the entry price attractive, but the small population of 6,334 people creates a shallow tenant pool, which limits how aggressively you can push rents before you're outrunning the local market's ability to absorb them.

The tax picture here is a serious underwriting consideration and cannot be treated as a footnote. Illinois carries a state-average effective property tax rate of 2.27%, which is flagged as very high, and on a $157,116 purchase that translates to $3,567 in annual property taxes. Add $424 in annual insurance and you are looking at $333 per month in combined tax and insurance carry before you account for mortgage, maintenance, vacancy, or management. At a 6.85% interest rate on an 80% LTV loan, that debt service is already substantial, and stacking $333 in monthly fixed overhead on top of it means your gross rent needs to clear a high bar before the deal pencils. The 2.27% figure is a state-average estimate per Tax Foundation 2024 data, and actual county and township rates in Brown County may differ materially, so pulling the specific assessor rate before closing is not optional, it is essential.

The county's national rank of 40 out of 1,000 places it in the 95th percentile nationally, and it ranks 32nd out of 102 Illinois counties. That overall score of 76 reflects the affordability and appreciation components carrying the weight, while stability sits at 50, which flags meaningful uncertainty about demand consistency in a county this small. No economic anchor data was provided, so this analysis cannot speak to specific employers or institutional demand drivers, and investors should treat that gap as a due diligence item rather than an assumption of stability.

The primary risk here is concentration in a single, small-population rural market. With 6,334 residents, any meaningful shift in local employment or outmigration creates disproportionate pressure on both occupancy and resale liquidity. Rural Illinois counties have faced population headwinds broadly, and while the 3.08% price appreciation suggests some demand support, the stability score of 50 cautions against assuming that trend is durable. Regulatory risk is not flagged by the available data, but the very high property tax burden is itself a form of structural drag on net returns that compounds over a long hold.

Compared to its neighbors, Brown County is not the obvious first call for yield-focused buyers. McDonough County shows a rent-to-price ratio of 0.1209 on a $92,986 median price with median rent of $937, which is a materially stronger gross yield profile than Brown's data supports, and it carries the same overall score of 76. Sangamon County at $186,233 median with a rent-to-price ratio of 0.0728 and median rent of $1,129 offers more absolute rent dollars but weaker gross yield. Brown County makes the most sense over its neighbors when the buyer's primary objective is low acquisition cost combined with modest appreciation in a market that neighboring counties like McDonough cannot match on affordability, and when the investor has sufficient reserves to weather the $333 monthly tax-and-insurance carry without requiring the property to generate positive cash flow from the outset.

Last analyzed August 8, 2026. Based on the latest available Zillow and Census data for Brown County.

Price History

Median Home Price

Median Rent

Historical data from Zillow ZHVI/ZORI

Score Breakdown

Overall Investment Score
76/100
76
Cash Flow(30%)
0/100

Rent data not available for cash flow calculation.

Appreciation(25%)
80/100

Based on 3.1% YoY price growth. Moderate growth (3-8%) scores highest.

Stability(25%)
50/100

Population data not available.

Affordability(20%)
96/100

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

  • +Affordable relative to local incomes

Challenges

  • -Negative leverage (cap rate 0.0% < mortgage rate 6.9%)
  • -Limited rent data (estimates used)

Economic Indicators

Population
6,334
Median Income
Data pending
Unemployment Rate
Data pending
Price-to-Income
Data pending

Who this market fits

Skip if
  • You can't tolerate negative leverage (cap rate below mortgage rate today)

Compare to Nearby Counties

CountyVerdict
CurrentBrownIL
76$157,116Est. pendingStrong Buy
McDonoughIL
76$92,986$93712.09%Strong BuyView
ClintonIL
76$212,337Est. pendingStrong BuyView
SangamonIL
76$186,233$1,1297.28%Strong BuyView
PikeIL
75$112,450Est. pendingStrong BuyView
ShelbyIL
75$156,256Est. pendingStrong BuyView

The Bottom Line

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

Brown County in Illinois scores 76/100, ranking #40 of 1,000 US counties (top 5%). At 20% down and current rates, a median-priced rental roughly breaks even on cash flow. The deal works on appreciation or with better terms, not on month-one cash flow.

Monthly Cash Flow
+$0/mo
Cap Rate
0.0%
Cash-on-Cash
0.0%

Related markets

Frequently asked questions

Cap rate data is not available for Brown County, suggesting limited rental activity or market data for this rural county.

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