Home Insurance in Johnson County, Illinois
Homes in Johnson County carry a median value of $160,500 - 39% lower than the Illinois median.
The typical home in Johnson County was built around 1985. About 14% of homes were built before 1960, about 23 points below Illinois's 38%. Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing.
In Johnson County, the housing stock is 67% single-family homes, 3% apartments in buildings with 5+ units and 27% mobile or manufactured homes. Mobile and manufactured homes typically need a manufactured-home (HO-7) policy rather than a standard homeowners policy.
About 40% of owner-occupied homes in Johnson County have a mortgage. Lenders require hazard (homeowners) insurance on any home carrying a mortgage.
About 82% of occupied homes in Johnson County are owner-occupied. The vacancy rate is 26%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy.
In Johnson County, 61% of homes are primarily heated with electricity. Homes heated with propane can carry added fire risk. Fuel-tank leaks and spills are often excluded from standard homeowners policies.
FEMA's National Risk Index lists earthquake (Relatively Moderate), strong wind (Relatively Moderate) and hail (Relatively Low) as the leading hazards for Johnson County. Standard homeowners policies exclude earthquake, so separate coverage is usually needed.
As of September 2026, Johnson County has 8 active NFIP flood insurance policies. Standard homeowners insurance does not cover flood damage, so flood coverage needs a separate NFIP or private flood policy.
In Illinois, the statewide average premium for a standard HO-3 homeowners policy is $1,480 per year (NAIC, 2023 data).
Key figures
| Median home value | $160,500 |
|---|---|
| Median year built | 1985 |
| Owner-occupied share | 82% |
| Share of owner-occupied homes with a mortgage | 40% |
| Top hazards (FEMA National Risk Index) | Earthquake (Relatively Moderate), Strong Wind (Relatively Moderate), Hail (Relatively Low) |
| Active NFIP flood policies (county) | 8 |
| Home insurance premium | $1,480 - statewide average (NAIC, 2023 data) |
Towns and cities
Sources
- U.S. Census Bureau Gazetteer Files (2024)
- U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates (2024)
- FEMA National Risk Index (December 2025)
- FEMA OpenFEMA NFIP Redacted Policies v3 (2026)
- NAIC Dwelling Fire, Homeowners Owner-Occupied, and Homeowners Tenant and Condominium/Cooperative Unit Owners Insurance: Data for 2023 (published 2026) (2023)