Jefferson County, Illinois has a 2026 one-unit conforming loan limit of $832,750, which is 6.6 times the county's median home value of $126,000, so a typical home there can be financed with a conforming (non-jumbo) loan; median household income is $63,118 (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) | $126,000 |
| Illinois median home value | $263,300 |
| Limit ÷ median home value | 6.61× |
| Median household income | $63,118 |
| Median home value ÷ income | 2.0× |
| Population | 36,550 |
| Median property tax paid (owners) | $2,148 |
| Effective property tax rate (approx.) | 1.70% |
| Owner-occupied homes | 71.7% |
| Home value rank in Illinois | 64 of 102 counties |
| Neighbor: Franklin County, IL | limit $832,750; median home $89,000 |
| Neighbor: Hamilton County, IL | limit $832,750; median home $113,700 |
| Neighbor: Marion County, IL | limit $832,750; median home $103,000 |
| Neighbor: Perry County, IL | limit $832,750; median home $112,600 |
| Neighbor: Washington County, IL | limit $832,750; median home $155,700 |
| Neighbor: Wayne County, IL | limit $832,750; median home $110,700 |
Across Illinois's 102 counties, FHFA's 2026 one-unit limits are $832,750 everywhere. Jefferson County's median home value is 52% below the state median of $263,300 (rank 64 of 102). Among its 6 neighboring counties, Washington County has the highest median home value ($155,700) and Franklin County the lowest ($89,000); all share the same loan limit. Owners pay a median $2,148 a year in property tax, an effective rate of about 1.70% 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: Jefferson County, GA
- 2026 conforming loan limit: Jefferson County, IA
- 2026 conforming loan limit: Jefferson County, ID
- 2026 conforming loan limit: Jefferson County, IN
- 2026 conforming loan limit: Jefferson County, KS
- 2026 conforming loan limit: Jefferson County, KY
- 2026 conforming loan limit: Jefferson County, MO
- 2026 conforming loan limit: Jefferson County, MS
Last updated 2026-10-16. Data only, not financial or tax advice.