Mercer County, NJ property tax
Census ACS 2023 5-year estimates · updated 2026-09-20
The median effective property tax rate in Mercer County is 2.51%, above the New Jersey median of 2.23% and above the national median of 0.98%. The median homeowner pays $8,804 a year on a home worth $351,000.
- Effective rate
- 2.51%
- Median annual bill
- $8,804
- Median home value
- $351,000
- Rank in New Jersey
- 5of 21
Estimated annual bill by home value
| Home value | Estimated bill | Per month |
|---|---|---|
| $200,000 | $5,020 | $418 |
| $300,000 | $7,530 | $627 |
| $400,000 | $10,040 | $837 |
| $500,000 | $12,550 | $1,046 |
| $750,000 | $18,825 | $1,569 |
| $1,000,000 | $25,100 | $2,092 |
Mercer County compared with New Jersey and the US
| Area | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Mercer County | 2.51% | $8,804 | $351,000 |
| New Jersey median | 2.23% | $9,541 | $427,600 |
| United States median | 0.98% | $2,969 | n/a |
Rates and medians: U.S. Census Bureau, ACS 2023 5-year estimates, tables B25103 and B25077. Effective rate is median taxes paid divided by median owner-occupied home value.
Frequently asked questions
What is the property tax rate in Mercer County, NJ?
The median effective property tax rate in Mercer County is 2.51% of home value, above the New Jersey median of 2.23% and above the national median of 0.98%. The median homeowner pays $8,804 a year on a median home value of $351,000 (Census ACS 2023 5-year).
How much is property tax on a $400,000 house in Mercer County?
About $10,040 per year at the county's median effective rate of 2.51%, before exemptions. The exact bill depends on the city, school district and special districts that serve the parcel, so treat this as a planning estimate.
How does Mercer County compare with the rest of New Jersey?
Mercer County ranks 5 of 21 New Jersey counties by effective rate. The New Jersey median is 2.23% and the median bill is $9,541.