St. Mary Parish, LA Property Taxes (2026)

St. Mary Parish owners pay a median of $515 a year on a median home value of $128,000, an effective rate of 0.40%. That's the 35th-highest rate of 64 Louisiana counties with Census data, below the Louisiana county median of 0.42%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

0.40%

35th highest of 64 in LA

Median annual bill

$515

~$43/month

Median home value

$128,000

Louisiana county median

0.42%

Effective rate

What a protest could save you in St. Mary Parish

Enter the market value from your appraisal notice. We apply St. Mary Parish's 0.40% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$512
Savings at 10–15% off
$51–$77
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St. Mary Parish vs. Louisiana vs. U.S. property tax rates

St. Mary Parish0.40%
Louisiana county median0.42%
U.S. county median0.84%

Key stat: St. Mary Parish's effective property tax rate is 0.40%, vs. 0.42% for the median Louisiana county and 0.84% for the median U.S. county. It ranks 35th of 64 in Louisiana. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in St. Mary Parish

  1. 1

    Review your assessment notice

    Check the assessed value from the St. Mary Parish Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The St. Mary Parish deadline is 15 days after public notice. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the Parish Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $515 bill, 10–15% off is $52–$77 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Louisiana

Louisiana homeowners may qualify for exemptions that reduce taxable value. Check with the St. Mary Parish Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in St. Mary Parish, Louisiana?
The median effective property tax rate in St. Mary Parish is 0.40%: a median annual bill of $515 on a median home value of $128,000. That's the 35th-highest rate of 64 Louisiana counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in St. Mary Parish?
The median St. Mary Parish property tax bill is $515 a year, about $43 a month, compared with a Louisiana county median of $551.
What is the deadline to appeal property taxes in St. Mary Parish?
The deadline to appeal in St. Mary Parish is 15 days after public notice. Missing it means waiting until the next assessment cycle.
Is St. Mary Parish a high property tax area?
St. Mary Parish's 0.40% effective rate is below the Louisiana county median of 0.42% and below the U.S. county median of 0.84%. That's the 35th-highest rate of 64 Louisiana counties with Census data.
Can TaxDrop help lower my St. Mary Parish property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Iberia Parish

Rate: 0.35%

Median bill: $547

Assumption Parish

Rate: 0.43%

Median bill: $609

St. Martin Parish

Rate: 0.40%

Median bill: $610

Terrebonne Parish

Rate: 0.45%

Median bill: $852

Iberville Parish

Rate: 0.33%

Median bill: $581

St. James Parish

Rate: 0.53%

Median bill: $1,043

Ascension Parish

Rate: 0.53%

Median bill: $1,419

Vermilion Parish

Rate: 0.34%

Median bill: $538

← All 64 Louisiana counties

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