St. Mary County, Louisiana Property Taxes
Property Taxes in St. Mary County, Louisiana
Median St. Mary County effective property tax rate: 1.08%, significantly higher than the national median of 1.02%.
Median St. Mary County home value: $64,590
Median annual St. Mary County tax bill: $697, $1,703 lower than the national median property tax bill of $2,400.
How are property taxes in St. Mary County calculated?
Property taxes in St. Mary 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 St. Mary County or another part of St. Mary County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
St. Mary County, Louisiana Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.08%
Estimate Property Tax Bill
$698
$647
How Does the St. Mary County Property Tax Calculator Work?
Use this St. Mary County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies St. Mary County's median effective tax rate of 1.08% to generate your estimate.
Enter your property's estimated assessed value — the figure the appraisal district 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.
St. Mary County's median effective tax rate is higher than Louisiana's 0.92% state median and above the 1.02% national median property tax rate. The county's median property tax bill is $697, compared with the $2,400 national median property tax bill.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across St. Mary County.
Property Tax Rates Across St. Mary County, Louisiana
What Are Effective Property Tax Rates Across St. Mary County?
Local government entities set tax rates, which vary widely across St. Mary 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 St. Mary County's effective property tax rate to other counties in Louisiana or the U.S. median of 1.02%.
St. Mary County's median effective rate stands at 1.08%, which is higher than the national median of 1.02%. Within St. Mary County, the highest rate is found in Jeanerette at 1.29%, while Berwick has the lowest at 0.93%.
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 St. Mary County Tax Rate
1.08%
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 Louisiana Tax Rate
0.92%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across St. Mary County, Louisiana
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Amelia | 0.84% | 0.84% | 1.00% | 1.00% | 1.00% |
| Baldwin | 1.07% | 1.07% | 1.07% | 1.17% | 1.28% |
| Berwick | 0.93% | 0.93% | 0.93% | 0.93% | 0.94% |
| Centerville | 1.08% | 1.08% | 1.08% | 1.08% | 1.12% |
| Charenton | 1.28% | 1.28% | 1.28% | 1.28% | 1.28% |
| Franklin | 1.08% | 1.08% | 1.15% | 1.15% | 1.28% |
| Jeanerette | 1.28% | 1.28% | 1.29% | 1.48% | 1.48% |
| Morgan City | 0.96% | 0.96% | 0.96% | 1.00% | 1.23% |
| Patterson | 1.04% | 1.04% | 1.11% | 1.11% | 1.11% |
| Cypremort Point | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across St. Mary County, Louisiana
When examining property taxes in St. Mary 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 St. Mary 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 St. Mary County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of April.
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 St. Mary County.
For example, the median tax bill in St. Mary County is $697, well below the national median property tax bill of $2,400. Tax bills range significantly across the county, from $609 in Franklin to $953 in Patterson. Patterson also has the highest median home price at $87,930, compared with the county median home price of $64,590.
Property Tax Assessment Values Across St. Mary County, Louisiana
Source: Ownwell
$10,640
$49,285
$87,930
Median St. Mary County Market Value
$64,590
Median Louisiana Market Value
$118,642
Median United States Market Value
$235,294
Property Tax Assessment Values Across St. Mary County, Louisiana
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Amelia | $4,389 | $6,162 | $10,640 | $24,580 | $36,675 |
| Baldwin | $14,752 | $31,020 | $57,400 | $97,180 | $150,338 |
| Berwick | $11,200 | $35,910 | $85,450 | $179,428 | $338,630 |
| Centerville | $3,408 | $18,795 | $60,850 | $121,958 | $214,820 |
| Charenton | $12,194 | $30,535 | $56,990 | $75,018 | $121,976 |
| Franklin | $7,620 | $22,932 | $52,820 | $98,038 | $181,498 |
| Jeanerette | $6,687 | $16,962 | $45,370 | $97,922 | $161,872 |
| Morgan City | $9,240 | $31,595 | $68,480 | $120,890 | $172,266 |
| Patterson | $12,035 | $40,125 | $87,930 | $142,880 | $208,148 |
| Cypremort Point | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across St. Mary County, Louisiana
Property tax bills in St. Mary are calculated by applying the local tax rate to a home’s assessed value, which is based on the market value of the property. That means two homes with similar prices can still have different bills if their assessments differ. Local taxing authorities use the assessed value to determine how much each homeowner owes, and the final bill reflects the specific tax rates set for the county and other local services.
With a median home price of $64,590, property taxes in St. Mary can still vary widely from one homeowner to another. The 25th percentile tax bill is $298, while the 75th percentile is $1,292 and the 90th percentile reaches $2,041. The highest median tax bill in the county is $953 in Patterson, while the lowest is $609 in Franklin. For homeowners, these differences can have a meaningful impact on monthly housing costs and overall affordability, especially when a property’s assessed value rises faster than expected.
Median St. Mary County Tax Bill
$697
Median Louisiana Tax Bill
$995
Median United States Tax Bill
$2,400
Property Tax Bills Across St. Mary County, Louisiana
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Amelia | $44 | $60 | $99 | $210 | $364 |
| Baldwin | $166 | $351 | $651 | $1,099 | $1,688 |
| Berwick | $104 | $336 | $795 | $1,653 | $3,106 |
| Centerville | $37 | $202 | $656 | $1,314 | $2,464 |
| Charenton | $156 | $390 | $727 | $958 | $1,557 |
| Franklin | $85 | $264 | $609 | $1,128 | $2,062 |
| Jeanerette | $86 | $227 | $618 | $1,341 | $2,212 |
| Morgan City | $95 | $316 | $695 | $1,233 | $1,796 |
| Patterson | $132 | $438 | $953 | $1,544 | $2,239 |
| Cypremort Point | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | September 15 |
Links | |
|---|---|
| St. Mary Tax Assessor | |
| Website | smpassessor.net |