Mercer County, New Jersey Property Taxes
Property Taxes in Mercer County, New Jersey
Median Mercer County effective property tax rate: 3.30%, significantly higher than the national median of 1.02%.
Median Mercer County home value: $217,000
Median annual Mercer County tax bill: $7,344, $4,944 higher than the national median property tax bill of $2,400.
How are property taxes in Mercer County calculated?
Property taxes in Mercer County are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Mercer County or another part of Mercer County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Mercer County, New Jersey Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
3.3%
Estimate Property Tax Bill
$7,161
$6,645
How Does the Mercer County Property Tax Calculator Work?
Use this Mercer County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Mercer County's median effective tax rate of 3.30% to generate your estimate.
Enter your property's estimated assessed value — the figure the assessor assigns for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Mercer County's median property tax rate is higher than the New Jersey median tax rate of 2.88% and far above the national median property tax rate of 1.02%. The county's median property tax bill of $7,344 is also higher than the national median property tax bill of $2,400.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Mercer County.
Property Tax Rates Across Mercer County, New Jersey
What Are Effective Property Tax Rates Across Mercer County?
Local government entities set tax rates, which vary widely across Mercer County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Mercer County's effective property tax rate to other counties in New Jersey or the U.S. median of 1.02%.
Mercer County's median effective rate stands at 3.30%, which is higher than the national median of 1.02%. Within Mercer County, the highest rate is found in Hightstown at 4.85%, while Princeton has the lowest at 2.51%.
These variations reflect differences in local school district levies, special assessment districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Mercer County Tax Rate
3.30%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective New Jersey Tax Rate
2.88%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Mercer County, New Jersey
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Allentown | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% |
| Cranbury | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% |
| East Windsor | 3.40% | 3.40% | 3.41% | 3.52% | 3.52% |
| Ewing | 3.70% | 3.70% | 3.70% | 3.70% | 3.70% |
| Hamilton | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% |
| Hamilton Square | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% |
| Hightstown | 3.12% | 3.52% | 4.85% | 4.85% | 4.85% |
| Hopewell | 2.98% | 3.06% | 3.14% | 3.31% | 3.31% |
| Lambertville | 3.06% | 3.06% | 3.06% | 3.06% | 3.06% |
| Lawrence Township | 3.04% | 3.04% | 3.04% | 3.04% | 3.04% |
| Lawrenceville | 3.04% | 3.04% | 3.04% | 3.04% | 3.04% |
| Pennington | 2.96% | 2.98% | 3.06% | 3.06% | 3.06% |
| Princeton | 2.51% | 2.51% | 2.51% | 2.94% | 2.94% |
| Princeton Junction | 2.94% | 2.94% | 2.94% | 2.94% | 2.94% |
| Robbinsville | 3.12% | 3.12% | 3.12% | 3.12% | 3.30% |
| Skillman | 3.06% | 3.06% | 3.06% | 3.06% | 3.06% |
| Trenton | 3.30% | 3.30% | 3.30% | 5.57% | 5.57% |
| West Windsor | 2.94% | 2.94% | 2.94% | 2.94% | 2.94% |
| Windsor | 3.12% | 3.12% | 3.12% | 3.12% | 3.12% |
| Joint Base Mdl | N/A | N/A | N/A | N/A | N/A |
| Mercerville | N/A | N/A | N/A | N/A | N/A |
| Millstone Township | N/A | N/A | N/A | N/A | N/A |
| Titusville | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Mercer County, New Jersey
When examining property taxes in Mercer County, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. Mercer County uses this value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Mercer County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of January.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Mercer County.
For example, the median tax bill in Mercer County is $7,344, compared with the national median property tax bill of $2,400. Tax bills range significantly across the county, with Skillman at the highest median home price at $1,093,700.
Property Tax Assessment Values Across Mercer County, New Jersey
Source: Ownwell
$42,100
$567,900
$1,093,700
Median Mercer County Market Value
$217,000
Median New Jersey Market Value
$288,200
Median United States Market Value
$235,294
Property Tax Assessment Values Across Mercer County, New Jersey
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Allentown | $257,780 | $272,500 | $293,900 | $324,200 | $403,080 |
| Cranbury | $298,710 | $313,300 | $355,550 | $365,600 | $378,280 |
| East Windsor | $166,200 | $194,400 | $267,800 | $351,500 | $433,500 |
| Ewing | $127,500 | $157,800 | $194,900 | $242,375 | $302,500 |
| Hamilton | $123,230 | $168,900 | $202,050 | $241,025 | $290,520 |
| Hamilton Square | $88,300 | $88,300 | $104,400 | $111,650 | $115,100 |
| Hightstown | $150,800 | $178,600 | $227,500 | $293,300 | $426,800 |
| Hopewell | $289,600 | $340,000 | $411,200 | $519,500 | $668,000 |
| Lambertville | $315,580 | $381,000 | $465,000 | $620,000 | $788,500 |
| Lawrence Township | $143,600 | $175,325 | $238,700 | $336,000 | $446,550 |
| Lawrenceville | $192,690 | $208,600 | $251,150 | $297,550 | $340,880 |
| Pennington | $278,700 | $325,300 | $421,350 | $562,850 | $714,910 |
| Princeton | $257,500 | $458,925 | $646,600 | $888,675 | $1,283,480 |
| Princeton Junction | $302,750 | $416,900 | $575,250 | $684,300 | $802,300 |
| Robbinsville | $159,800 | $226,850 | $343,900 | $484,925 | $575,000 |
| Skillman | $611,910 | $761,400 | $1,093,700 | $1,258,475 | $1,347,010 |
| Trenton | $41,100 | $59,200 | $141,800 | $219,300 | $282,600 |
| West Windsor | $257,500 | $382,100 | $663,550 | $705,225 | $772,670 |
| Windsor | $185,000 | $209,500 | $260,000 | $319,450 | $422,920 |
| Joint Base Mdl | N/A | N/A | N/A | N/A | N/A |
| Mercerville | N/A | N/A | N/A | N/A | N/A |
| Millstone Township | N/A | N/A | N/A | N/A | N/A |
| Titusville | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Mercer County, New Jersey
How are property tax bills calculated in Mercer County, New Jersey?
Property tax bills are based on the assessed value of a home and the local tax rate set by taxing authorities. In Mercer County, the median home price is $217,000, and that value helps shape the size of the bill, though the final amount also depends on the municipality, school district, and other local levies. Homeowners with higher assessed values generally pay more, while those with lower assessed values usually pay less.
What do Mercer County homeowners typically pay?
The 25th percentile tax bill is $4,707, the 75th percentile is $11,567, and the 90th percentile reaches $17,297. That means many homeowners pay well above the national median property tax bill of $2,400, showing how property taxes in Mercer County can be a major housing cost. Bills can vary widely across the county, from $3,448 in Hamilton Square to $33,423 in Skillman.
Median Mercer County Tax Bill
$7,344
Median New Jersey Tax Bill
$8,638
Median United States Tax Bill
$2,400
Property Tax Bills Across Mercer County, New Jersey
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Allentown | $8,514 | $9,001 | $9,708 | $10,708 | $13,314 |
| Cranbury | $10,150 | $10,646 | $12,082 | $12,423 | $12,854 |
| East Windsor | $5,644 | $6,609 | $9,333 | $12,260 | $15,265 |
| Ewing | $4,734 | $5,834 | $7,194 | $8,936 | $11,161 |
| Hamilton | $4,136 | $5,588 | $6,684 | $7,976 | $9,515 |
| Hamilton Square | $2,917 | $2,917 | $3,448 | $3,688 | $3,802 |
| Hightstown | $7,032 | $8,239 | $10,446 | $13,108 | $14,946 |
| Hopewell | $9,058 | $10,901 | $13,217 | $16,553 | $20,154 |
| Lambertville | $9,644 | $11,643 | $14,210 | $18,947 | $23,821 |
| Lawrence Township | $4,352 | $5,307 | $7,217 | $10,158 | $13,472 |
| Lawrenceville | $5,832 | $6,319 | $7,593 | $9,019 | $10,222 |
| Pennington | $8,313 | $9,856 | $12,785 | $16,985 | $21,687 |
| Princeton | $7,563 | $12,183 | $17,054 | $23,113 | $32,234 |
| Princeton Junction | $8,877 | $12,241 | $16,861 | $20,071 | $23,533 |
| Robbinsville | $4,984 | $7,118 | $10,854 | $15,127 | $17,934 |
| Skillman | $18,700 | $23,268 | $33,423 | $38,459 | $41,165 |
| Trenton | $2,205 | $3,134 | $5,177 | $7,419 | $9,536 |
| West Windsor | $7,563 | $11,222 | $19,488 | $20,617 | $22,693 |
| Windsor | $5,793 | $6,477 | $8,109 | $9,964 | $13,191 |
| Joint Base Mdl | N/A | N/A | N/A | N/A | N/A |
| Mercerville | N/A | N/A | N/A | N/A | N/A |
| Millstone Township | N/A | N/A | N/A | N/A | N/A |
| Titusville | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | April 1 |
Links | |
|---|---|
| Mercer Tax Assessor | |
| Website | pip.mercercounty.org |