Williamson County, Illinois has a 2026 one-unit conforming loan limit of $832,750, which is 5.3 times the county's median home value of $156,400, so a typical home there can be financed with a conforming (non-jumbo) loan; median household income is $65,604 (FHFA; Census ACS 2020–2024).
Data as of 2026. Source: FHFA 2026 conforming loan limits; U.S. Census Bureau ACS 2020–2024
| Item | Value |
|---|---|
| 1-unit limit (2026) | $832,750 |
| 2-unit limit | $1,066,250 |
| 3-unit limit | $1,288,800 |
| 4-unit limit | $1,601,750 |
| Median home value (ACS 2020–24) | $156,400 |
| Illinois median home value | $263,300 |
| Limit ÷ median home value | 5.32× |
| Median household income | $65,604 |
| Median home value ÷ income | 2.4× |
| Population | 66,876 |
| Median property tax paid (owners) | $2,690 |
| Effective property tax rate (approx.) | 1.72% |
| Owner-occupied homes | 70.7% |
| Home value rank in Illinois | 34 of 102 counties |
| Neighbor: Franklin County, IL | limit $832,750; median home $89,000 |
| Neighbor: Jackson County, IL | limit $832,750; median home $137,300 |
| Neighbor: Johnson County, IL | limit $832,750; median home $160,500 |
| Neighbor: Saline County, IL | limit $832,750; median home $94,300 |
| Neighbor: Union County, IL | limit $832,750; median home $131,700 |
Across Illinois's 102 counties, FHFA's 2026 one-unit limits are $832,750 everywhere. Williamson County's median home value is 41% below the state median of $263,300 (rank 34 of 102). Among its 5 neighboring counties, Johnson County has the highest median home value ($160,500) and Franklin County the lowest ($89,000); all share the same loan limit. Owners pay a median $2,690 a year in property tax, an effective rate of about 1.72% of home value.
County data: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024 (tables B25077, B19013, B01003, B25103, B25003). Neighbors: Census county adjacency file.
Related
- 2026 conforming loan limit: Williams County, OH
- 2026 conforming loan limit: Williamsburg City, VA
- 2026 conforming loan limit: Williamsburg County, SC
- 2026 conforming loan limit: Williamson County, TN
- 2026 conforming loan limit: Williamson County, TX
- 2026 conforming loan limit: Wilson County, KS
- 2026 conforming loan limit: Wilson County, NC
- 2026 conforming loan limit: Wilson County, TN
Last updated 2026-10-16. Data only, not financial or tax advice.