Home Insurance in Mercer County, New Jersey
Homes in Mercer County carry a median value of $377,700 - 17% lower than the New Jersey median.
The typical home in Mercer County was built around 1969. About 38% of homes were built before 1960, in line with New Jersey (38%). Older homes can cost more to insure or rebuild because of aging wiring, roofing and plumbing.
Housing in Mercer County breaks down to 68% single-family homes, 23% apartments in buildings with 5+ units and 1% mobile or manufactured homes.
In Mercer County, about 62% of owner-occupied homes have a mortgage - lenders require hazard insurance on every mortgaged home.
About 62% of occupied homes in Mercer County are owner-occupied. The vacancy rate is 5%; vacant or unoccupied homes typically need a different coverage form than an owner-occupied policy.
Most homes in Mercer County - 71% - are primarily heated with natural gas. Homes heated with fuel oil can carry added fire risk. Fuel-tank leaks and spills are often excluded from standard homeowners policies.
FEMA's National Risk Index lists strong wind (Very High), winter weather (Very High) and inland flooding (Relatively High) as the leading hazards for Mercer County.
Standard homeowners insurance does not cover flood damage, so flood coverage needs a separate NFIP or private flood policy. As of September 2026, Mercer County has 1,488 active NFIP flood policies on file.
The statewide average premium for a standard HO-3 homeowners policy in New Jersey is $1,551 per year, according to the NAIC homeowners insurance report (2023 data).
Key figures
| Median home value | $377,700 |
|---|---|
| Median year built | 1969 |
| Owner-occupied share | 62% |
| Share of owner-occupied homes with a mortgage | 62% |
| Top hazards (FEMA National Risk Index) | Strong Wind (Very High), Winter Weather (Very High), Inland Flooding (Relatively High) |
| Active NFIP flood policies (county) | 1,488 |
| Home insurance premium | $1,551 - statewide average (NAIC, 2023 data) |
Towns and cities
Smaller communities
-
Hopewell
- Median home value: $586,600
- Median year built: 1939 or earlier
- Owner-occupied share: 76%
-
Trenton
- Median home value: $160,700
- Median year built: 1953
- Owner-occupied share: 38%
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)