Jefferson County, New York Property Taxes
Property Taxes in Jefferson County, New York
Median Jefferson County effective property tax rate: 1.66%, significantly higher than the national median of 1.02%.
Median Jefferson County home value: $160,549
Median annual Jefferson County tax bill: $2,930, higher than the national median property tax bill of $2,400.
How are property taxes in Jefferson County calculated?
Property taxes in Jefferson 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.
Jefferson County’s effective property tax rate of 1.66% is also lower than the New York median tax rate of 1.90%, but the median annual tax bill is still $530 higher than the state comparison provided. Understanding how assessed value, market value, and exemptions work can help homeowners and investors identify savings opportunities.
Whether you live in Jefferson County or elsewhere in the county, reviewing your property tax assessment and available exemptions can make a meaningful difference.
Last Updated April 13, 2026
Jefferson County, New York Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.66%
Estimate Property Tax Bill
$2,665
$2,473
How Does the Jefferson County Property Tax Calculator Work?
Use this Jefferson County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Jefferson County's median effective tax rate of 1.66% to generate your estimate.
Enter your property's estimated assessed value — the figure used 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. Jefferson County's median effective tax rate is higher than New York's 1.90% state median tax rate, and the county's median property tax bill is $2,930, which is $530 higher than the state median bill and above the $2,400 national median property tax bill.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Jefferson County.
Property Tax Rates Across Jefferson County, New York
What Are Effective Property Tax Rates Across Jefferson County?
Local government entities set tax rates, which vary widely across Jefferson 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 Jefferson County's effective property tax rate to other counties in New York or the U.S. median of 1.02%.
Jefferson County's median effective rate stands at 1.66%, which is higher than the national median of 1.02%. Within Jefferson County, the highest rate is found in Redwood at 2.39%, while Theresa has the lowest at 1.05%.
These variations reflect differences in local school district levies, special district levies 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 Jefferson County Tax Rate
1.66%
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 York Tax Rate
1.90%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Jefferson County, New York
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Adams | 1.34% | 1.50% | 1.77% | 2.25% | 2.37% |
| Adams Center | 1.38% | 1.60% | 1.80% | 1.94% | 1.96% |
| Alexandria Bay | 1.40% | 2.17% | 2.23% | 2.85% | 2.87% |
| Antwerp | 1.23% | 1.33% | 1.41% | 1.76% | 2.09% |
| Belleville | 1.38% | 1.52% | 1.71% | 1.82% | 1.94% |
| Black River | 1.42% | 1.59% | 1.76% | 1.93% | 2.25% |
| Brownville | 1.81% | 1.94% | 2.10% | 2.19% | 2.19% |
| Calcium | 1.07% | 1.19% | 1.37% | 1.65% | 1.99% |
| Cape Vincent | 1.26% | 1.40% | 1.40% | 1.54% | 1.91% |
| Carthage | 1.31% | 1.51% | 1.77% | 2.17% | 2.41% |
| Chaumont | 1.46% | 1.89% | 2.12% | 2.12% | 2.41% |
| Clayton | 1.26% | 1.40% | 1.46% | 1.91% | 1.99% |
| Copenhagen | 1.18% | 1.43% | 1.58% | 1.67% | 1.85% |
| Deferiet | 1.58% | 1.74% | 2.03% | 2.53% | 3.22% |
| Depauville | 1.35% | 1.51% | 1.68% | 1.90% | 2.27% |
| Dexter | 1.47% | 1.64% | 1.68% | 1.95% | 2.28% |
| Ellisburg | 1.15% | 1.42% | 1.54% | 1.70% | 1.92% |
| Evans Mills | 0.83% | 0.95% | 1.09% | 1.37% | 1.58% |
| Felts Mills | 1.42% | 1.67% | 1.80% | 2.23% | 3.13% |
| Fishers Landing | 1.29% | 1.43% | 1.44% | 1.44% | 1.57% |
| Frontenac | 1.46% | 1.46% | 1.46% | 1.46% | 1.57% |
| Gouverneur | 1.30% | 1.41% | 1.90% | 2.16% | 2.26% |
| Great Bend | 1.16% | 1.54% | 1.75% | 1.83% | 4.33% |
| Grenell | 1.44% | 1.44% | 1.44% | 1.44% | 1.58% |
| Hammond | 1.02% | 1.82% | 2.31% | 2.41% | 2.41% |
| Henderson | 1.25% | 1.47% | 1.47% | 1.53% | 1.53% |
| Henderson Harbor | 1.38% | 1.47% | 1.47% | 1.47% | 1.49% |
| Lacona | 1.48% | 1.61% | 1.73% | 1.73% | 1.73% |
| La Fargeville | 1.05% | 1.26% | 1.40% | 1.59% | 2.25% |
| Lorraine | 1.55% | 1.77% | 1.88% | 1.92% | 2.61% |
| Mannsville | 1.25% | 1.46% | 1.58% | 1.74% | 1.98% |
| Murray Isle | 1.44% | 1.44% | 1.44% | 1.44% | 1.44% |
| Natural Bridge | 1.07% | 1.30% | 1.53% | 1.90% | 2.55% |
| Philadelphia | 1.05% | 1.33% | 1.54% | 1.90% | 1.97% |
| Plessis | 2.10% | 2.28% | 2.34% | 2.49% | 2.69% |
| Redwood | 1.05% | 1.05% | 2.39% | 2.57% | 3.31% |
| Rodman | 1.18% | 1.42% | 1.57% | 1.70% | 1.88% |
| Sackets Harbor | 1.51% | 1.66% | 1.77% | 1.88% | 2.10% |
| Theresa | 0.91% | 1.05% | 1.05% | 1.46% | 2.19% |
| Thousand Island Park | 1.40% | 1.40% | 1.40% | 1.40% | 2.16% |
| Three Mile Bay | 2.00% | 2.12% | 2.12% | 2.12% | 2.19% |
| Watertown | 1.21% | 1.47% | 1.65% | 1.71% | 1.88% |
| Wellesley Island | 1.40% | 1.40% | 2.14% | 2.23% | 2.23% |
| Fineview | N/A | N/A | N/A | N/A | N/A |
| Hounsfield | N/A | N/A | N/A | N/A | N/A |
| Pierrepont Manor | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Jefferson County, New York
When examining property taxes in Jefferson 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. The Jefferson County assessor estimates the market 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 Jefferson County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.
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 Jefferson County.
For example, the median tax bill in Jefferson County is $2,930, with tax bills ranging significantly across the county. Frontenac has the highest median home price at $593,750.
Property Tax Assessment Values Across Jefferson County, New York
Source: Ownwell
$36,585
$315,168
$593,750
Median Jefferson County Market Value
$160,549
Median New York Market Value
$312,500
Median United States Market Value
$235,294
Property Tax Assessment Values Across Jefferson County, New York
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Adams | $57,246 | $104,626 | $157,234 | $233,529 | $339,026 |
| Adams Center | $67,368 | $120,000 | $161,765 | $219,559 | $294,118 |
| Alexandria Bay | $66,769 | $116,385 | $190,615 | $366,081 | $690,154 |
| Antwerp | $61,875 | $102,778 | $141,250 | $191,215 | $253,542 |
| Belleville | $99,459 | $110,135 | $141,892 | $179,189 | $227,297 |
| Black River | $88,853 | $138,415 | $188,171 | $242,683 | $307,649 |
| Brownville | $105,688 | $136,250 | $168,750 | $223,594 | $291,812 |
| Calcium | $62,566 | $113,352 | $153,952 | $205,405 | $258,712 |
| Cape Vincent | $44,110 | $108,904 | $179,178 | $281,541 | $403,740 |
| Carthage | $58,000 | $105,000 | $145,000 | $202,225 | $280,000 |
| Chaumont | $60,395 | $119,896 | $182,895 | $270,548 | $392,500 |
| Clayton | $89,041 | $164,583 | $244,792 | $380,208 | $575,342 |
| Copenhagen | $50,965 | $103,415 | $168,902 | $234,024 | $332,626 |
| Deferiet | $92,800 | $112,500 | $128,000 | $150,000 | $190,000 |
| Depauville | $59,219 | $95,312 | $139,062 | $182,292 | $210,209 |
| Dexter | $56,500 | $110,220 | $161,875 | $238,386 | $333,874 |
| Ellisburg | $79,595 | $97,973 | $145,270 | $189,865 | $258,108 |
| Evans Mills | $61,320 | $124,297 | $185,628 | $249,946 | $313,676 |
| Felts Mills | $61,342 | $97,896 | $134,085 | $169,024 | $242,622 |
| Fishers Landing | $62,256 | $115,427 | $221,952 | $313,415 | $468,537 |
| Frontenac | $345,833 | $479,167 | $593,750 | $664,583 | $870,833 |
| Gouverneur | $31,764 | $61,319 | $130,556 | $164,930 | $199,320 |
| Great Bend | $29,710 | $52,850 | $130,800 | $171,750 | $192,310 |
| Grenell | $247,292 | $322,917 | $442,708 | $520,833 | $617,500 |
| Hammond | $53,323 | $75,692 | $122,154 | $196,462 | $258,954 |
| Henderson | $54,832 | $102,688 | $197,838 | $318,368 | $444,108 |
| Henderson Harbor | $114,051 | $214,805 | $313,914 | $442,769 | $646,881 |
| Lacona | $50,730 | $63,682 | $130,203 | $229,122 | $296,459 |
| La Fargeville | $54,268 | $95,320 | $140,496 | $201,403 | $272,932 |
| Lorraine | $34,000 | $57,122 | $108,182 | $172,160 | $247,121 |
| Mannsville | $57,272 | $102,703 | $153,243 | $225,270 | $321,405 |
| Murray Isle | $188,594 | $333,334 | $472,916 | $623,698 | $779,688 |
| Natural Bridge | $30,000 | $55,000 | $110,000 | $160,000 | $206,500 |
| Philadelphia | $49,868 | $96,448 | $151,316 | $209,079 | $282,632 |
| Plessis | $42,800 | $82,038 | $146,170 | $198,269 | $360,107 |
| Redwood | $57,385 | $98,829 | $153,846 | $240,478 | $339,508 |
| Rodman | $42,085 | $107,900 | $175,100 | $267,288 | $340,308 |
| Sackets Harbor | $79,088 | $163,791 | $224,725 | $318,214 | $419,627 |
| Theresa | $46,914 | $84,321 | $142,346 | $219,136 | $288,889 |
| Thousand Island Park | $13,269 | $24,146 | $36,585 | $60,976 | $111,024 |
| Three Mile Bay | $35,132 | $101,118 | $165,658 | $231,513 | $331,447 |
| Watertown | $66,100 | $96,600 | $137,100 | $201,450 | $290,875 |
| Wellesley Island | $109,756 | $203,738 | $346,572 | $518,992 | $773,523 |
| Fineview | N/A | N/A | N/A | N/A | N/A |
| Hounsfield | N/A | N/A | N/A | N/A | N/A |
| Pierrepont Manor | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Jefferson County, New York
Property tax bills in Jefferson County are based on the assessed value of a home and the local tax rate. When a property’s market value changes, the assessed value can change too, which can affect the final bill. Local taxing authorities use that assessed value to calculate what a homeowner owes each year.
For a home with a median price of $160,549, the bill can vary widely depending on location and assessment details. In this county, the 25th percentile tax bill is $1,798, while the 75th percentile is $4,404 and the 90th percentile reaches $6,458. That spread shows how much taxes can differ from one homeowner to another.
Some areas carry much higher bills than others, with the highest median tax bill at $8,791 in Frontenac and the lowest at $519 in Thousand Island Park. For homeowners, this means property taxes can have a major impact on annual housing costs and overall affordability.
Median Jefferson County Tax Bill
$2,930
Median New York Tax Bill
$5,420
Median United States Tax Bill
$2,400
Property Tax Bills Across Jefferson County, New York
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Adams | $947 | $1,870 | $2,997 | $4,312 | $6,095 |
| Adams Center | $1,144 | $2,023 | $2,850 | $4,016 | $5,137 |
| Alexandria Bay | $1,417 | $2,759 | $4,498 | $7,660 | $15,081 |
| Antwerp | $827 | $1,575 | $2,240 | $2,957 | $3,919 |
| Belleville | $1,272 | $1,892 | $2,373 | $2,945 | $3,737 |
| Black River | $1,578 | $2,477 | $3,320 | $4,369 | $5,341 |
| Brownville | $2,129 | $2,804 | $3,561 | $4,636 | $6,121 |
| Calcium | $1,006 | $1,485 | $2,053 | $2,731 | $3,534 |
| Cape Vincent | $630 | $1,566 | $2,693 | $4,003 | $5,815 |
| Carthage | $1,014 | $1,832 | $2,705 | $3,728 | $4,769 |
| Chaumont | $1,195 | $2,376 | $3,626 | $5,499 | $7,709 |
| Clayton | $1,297 | $2,341 | $3,939 | $6,013 | $9,133 |
| Copenhagen | $760 | $1,576 | $2,539 | $3,773 | $4,856 |
| Deferiet | $1,664 | $2,215 | $2,693 | $3,766 | $4,387 |
| Depauville | $1,145 | $1,755 | $2,255 | $2,799 | $3,541 |
| Dexter | $989 | $1,946 | $2,863 | $4,153 | $5,855 |
| Ellisburg | $1,103 | $1,378 | $2,399 | $3,093 | $4,220 |
| Evans Mills | $627 | $1,252 | $2,044 | $2,839 | $3,679 |
| Felts Mills | $1,340 | $1,916 | $2,509 | $3,270 | $4,200 |
| Fishers Landing | $910 | $1,649 | $3,333 | $4,839 | $6,836 |
| Frontenac | $5,609 | $7,059 | $8,791 | $10,575 | $14,289 |
| Gouverneur | $715 | $863 | $2,144 | $2,746 | $3,419 |
| Great Bend | $1,012 | $1,249 | $1,470 | $2,768 | $3,656 |
| Grenell | $3,737 | $4,690 | $6,428 | $7,867 | $9,627 |
| Hammond | $504 | $1,254 | $2,507 | $5,869 | $7,327 |
| Henderson | $792 | $1,453 | $2,837 | $4,563 | $6,587 |
| Henderson Harbor | $1,635 | $2,915 | $4,526 | $6,473 | $9,312 |
| Lacona | $818 | $1,028 | $2,176 | $3,807 | $4,806 |
| La Fargeville | $727 | $1,264 | $2,081 | $3,066 | $4,350 |
| Lorraine | $614 | $1,131 | $2,054 | $3,278 | $4,480 |
| Mannsville | $897 | $1,608 | $2,480 | $3,658 | $5,363 |
| Murray Isle | $2,571 | $5,232 | $6,847 | $9,092 | $11,261 |
| Natural Bridge | $561 | $975 | $1,719 | $2,398 | $3,341 |
| Philadelphia | $721 | $1,337 | $2,452 | $3,409 | $4,323 |
| Plessis | $1,000 | $2,105 | $2,943 | $4,691 | $9,957 |
| Redwood | $1,054 | $1,796 | $3,161 | $4,844 | $7,427 |
| Rodman | $761 | $1,548 | $2,756 | $3,941 | $5,197 |
| Sackets Harbor | $1,380 | $2,810 | $4,055 | $5,656 | $7,661 |
| Theresa | $529 | $1,017 | $1,766 | $2,713 | $3,659 |
| Thousand Island Park | $214 | $349 | $519 | $845 | $1,787 |
| Three Mile Bay | $792 | $2,127 | $3,493 | $4,957 | $7,143 |
| Watertown | $1,088 | $1,992 | $3,046 | $4,408 | $5,714 |
| Wellesley Island | $1,782 | $3,318 | $6,026 | $10,636 | $16,183 |
| Fineview | N/A | N/A | N/A | N/A | N/A |
| Hounsfield | N/A | N/A | N/A | N/A | N/A |
| Pierrepont Manor | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to file a grievance!
Dates | |
|---|---|
| Appeal Deadline | May 26 |
Links | |
|---|---|
| Jefferson Assessment Review Commission | |
| Website | jefferson.sdgnys.com |
Frequently Asked Property Tax Questions in Jefferson County, New York
How are property taxes calculated in Jefferson County, New York?
How do I appeal my property taxes in Jefferson County, New York?
What property tax exemptions are available in Jefferson County, New York?
When are property taxes due in Jefferson County, New York?
How can Ownwell help reduce my property taxes in Jefferson County, New York?
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