Rental numbers for Williamson County, IL
The typical home here runs -$483 a month at 7.78% with 25% down, breaking even at about 0.8%. 0 of 1 ZIP codes with full Zillow data in this county are cash-flow positive; the median gross yield is 6.9%.
- Gross yield
- 7.6%
- typical home, Zillow
- Median ZIP yield
- 6.9%
- 1 ZIPs with full data
- Cash flow
- -$483/mo
- at 7.78%, 25% down
- Typical price
- $158,000
- Zillow ZHVI, Aug 2026
- Typical rent
- $1,000/mo
- Zillow ZORI, Aug 2026
ZIP codes in Williamson County
8 with published figures
| 62948Herrin | $115,000 | $1,160* | 12.1% | 6.2% | -$25 | n/a |
| 62951Johnston City | $106,000 | $930* | 10.6% | 4.4% | -$179 | n/a |
| 62974Pittsburg | $152,000 | $1,050* | 8.3% | 4.1% | -$304 | n/a |
| 62959Marion | $183,000 | $1,046 | 6.9% | 2.3% | -$635 | n/a |
| 62933Energy | $166,000 | $940* | 6.8% | 2.1% | -$597 | n/a |
| 62918Carterville | $200,000 | $1,120* | 6.7% | 2.2% | -$705 | n/a |
| 62902Carbondale | $202,000 | $940* | 5.6% | 0.9% | -$932 | n/a |
| 62922Creal Springs | $202,000 | $930* | 5.5% | 1.2% | -$887 | n/a |
* HUD Fair Market Rent, 2 bedroom, where Zillow publishes no rent index. Conservative.
Trends
Five years to August 2026
- Price, 12 months
- +0.0%
- Rent, 12 months
- +5.0%
- Rent minus price growth
- +5.0 pts
- Property tax
- 1.72%
- effective rate, ACS 2024
Show the numbers
| Month | Typical value | Rent |
|---|---|---|
| Aug 2021 | $136,195 | n/a |
| Aug 2022 | $149,257 | $785 |
| Aug 2023 | $151,393 | $819 |
| Aug 2024 | $154,826 | $910 |
| Aug 2025 | $157,852 | $952 |
| Aug 2026 | $157,901 | $1,000 |
HUD Fair Market Rent
FY2027, Williamson County, IL
| Bedrooms | Studio | 1 bed | 2 bed | 3 bed | 4 bed |
|---|---|---|---|---|---|
| Fair Market Rent | $694 | $761 | $996 | $1,304 | $1,309 |
The 40th percentile gross rent for a standard unit, set by HUD each October and used for Section 8 payment standards. It runs below market rent; Zillow's index is shown above where it exists.
Supply
- Permits per 1,000 households
- 5.1
- 148 units, last 12 months
- National percentile
- 49th
- among US counties
Tools
Test a listing in Williamson County against today's rate.
Open the calculatorPart of the Carbondale, IL metro.
Questions
- Is Williamson County good for rental property?
- The typical home here runs -$483 a month at 7.78% with 25% down, breaking even at about 0.8%. 0 of 1 ZIP codes with full Zillow data in this county are cash-flow positive; the median gross yield is 6.9%. The figures use a typical home, 7.78% with 25% down and default costs shown on each ZIP page. They describe the market, not any one property.
- What is the property tax rate in Williamson County?
- About 1.72% of value, from Census ACS median taxes paid over median home value. On a $158,000 home that is about $2,716 a year.
- What is Fair Market Rent in Williamson County?
- HUD's FY2027 Fair Market Rent here is $761 for a 1-bedroom, $996 for a 2-bedroom and $1,304 for a 3-bedroom. Typical cash flow at today's rate is -$483 a month.
Sources and method
- Zillow Home Value Index (ZHVI), mid tier, smoothed and seasonally adjusted
Zillow Research. Read: 2026-08.
Typical home value by ZIP, county, metro and state, and the price trend.
- Zillow Observed Rent Index (ZORI), all homes plus multifamily, smoothed
Zillow Research. Read: 2026-08.
Typical market rent by ZIP, county and metro, and the rent trend (tier A pages).
- HUD Small Area Fair Market Rents, FY2026
US Department of Housing and Urban Development. Read: FY2026.
Rent by bedroom count for every ZIP. The rent used on tier B pages, and a reference on all pages. It is the 40th percentile gross rent, so it runs below market.
- HUD Fair Market Rents by county, FY2027
US Department of Housing and Urban Development. Read: FY2027.
County rent by bedroom count on county pages.
- American Community Survey 5-year estimates, 2020 to 2024 (B25103 median real estate taxes paid, B25077 median home value, B11001 households)
US Census Bureau. Read: 2020 to 2024.
Effective property tax rate (median taxes paid divided by median value) by ZIP code tabulation area, county and state; households for the permits ratio.
- Freddie Mac Primary Mortgage Market Survey, 30-year fixed (FRED series MORTGAGE30US)
Freddie Mac via the Federal Reserve Bank of St. Louis. Read: 2026-09-24.
The weekly 30-year rate. The site adds a disclosed investor premium to it for the loan payment.
- Building Permits Survey, county monthly files
US Census Bureau. Read: 2025-09 to 2026-08.
New housing units permitted in the last 12 months per 1,000 households, a supply-pressure signal.
Data: Zillow Research (ZHVI, ZORI), HUD, US Census Bureau, Freddie Mac. Every formula is on the methodology page.
Estimates from public data for a typical property. Not investment, tax or legal advice. Your property, financing and costs will differ.