Mercer County, Illinois has a 2026 one-unit conforming loan limit of $832,750, which is 5.7 times the county's median home value of $146,700, so a typical home there can be financed with a conforming (non-jumbo) loan; median household income is $74,182 (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) | $146,700 |
| Illinois median home value | $263,300 |
| Limit ÷ median home value | 5.68× |
| Median household income | $74,182 |
| Median home value ÷ income | 2.0× |
| Population | 15,495 |
| Median property tax paid (owners) | $2,878 |
| Effective property tax rate (approx.) | 1.96% |
| Owner-occupied homes | 83.8% |
| Home value rank in Illinois | 41 of 102 counties |
| Neighbor: Henderson County, IL | limit $832,750; median home $104,400 |
| Neighbor: Henry County, IL | limit $832,750; median home $151,600 |
| Neighbor: Knox County, IL | limit $832,750; median home $111,900 |
| Neighbor: Rock Island County, IL | limit $832,750; median home $150,400 |
| Neighbor: Warren County, IL | limit $832,750; median home $105,000 |
| Neighbor: Des Moines County, IA | limit $832,750; median home $136,500 |
| Neighbor: Louisa County, IA | limit $832,750; median home $150,100 |
Across Illinois's 102 counties, FHFA's 2026 one-unit limits are $832,750 everywhere. Mercer County's median home value is 44% below the state median of $263,300 (rank 41 of 102). Among its 7 neighboring counties, Henry County has the highest median home value ($151,600) and Henderson County the lowest ($104,400); all share the same loan limit. Owners pay a median $2,878 a year in property tax, an effective rate of about 1.96% 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: Menominee County, MI
- 2026 conforming loan limit: Menominee County, WI
- 2026 conforming loan limit: Merced County, CA
- 2026 conforming loan limit: Mercer County, KY
- 2026 conforming loan limit: Mercer County, MO
- 2026 conforming loan limit: Mercer County, ND
- 2026 conforming loan limit: Mercer County, NJ
- 2026 conforming loan limit: Mercer County, OH
Last updated 2026-10-16. Data only, not financial or tax advice.