St. Mary Parish, LA property tax rate
St. Mary Parish · Louisiana · #37 of 63 in the state
Median annual property tax $545 · median home value $138,900
$545 a year · $45 a month using the area benchmark. Enter a value such as 350,000 or 350,000.00.
A rough planning estimate, not a tax quote.
Below the U.S. benchmark 0.94% (0.42×), below the Louisiana benchmark 0.55%.
Ranked among 63 Louisiana counties with available benchmarks; 1 county is not ranked because required figures are missing or reported as ranges.
What this benchmark means
Median real estate taxes paid ÷ median owner-occupied home value, ACS 2020–2024 — a ratio of two medians, not a statutory rate, not the median of individual bills and not your property's rate. Exemptions people already claim are reflected in the survey; your bill depends on taxable value, local districts, exemptions and reassessment after a sale.
Census figures behind this page
| Median real estate taxes paid | $545 |
|---|---|
| With a mortgage / without | $658 / $447 |
| Median home value | $138,900 |
| Median household income | $52,576 · tax is 1.0% of it |
| Median gross rent | $848 / mo |
| Owner-occupied | 69% of 18,463 homes |
| Population | 47,828 |
When it's due in Louisiana
All states| Annual payment | Due Dec 31 Late after Jan 1 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
|---|---|
| Late penalty | 1% per month interest (12% annually) from delinquency date plus 10% collection attorney fee (La. R.S. 47:2124) |
| Appeal window | within 15 calendar days of public exposure of assessment rolls (typically mid-August) to parish Board of Review (La. R.S. 47:1992) |
Ad valorem taxes are due on receipt of bill and delinquent after December 31. Regular annual schedule; tax year: calendar 2026, bills mailed November. Source: La. R.S. 47:2124, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.
Louisiana counties with a similar rate
All 64How this benchmark was computed
Median real estate taxes paid by owner-occupied households in St. Mary Parish ($545) divided by the median value of those homes ($138,900), both from the Census Bureau's American Community Survey 2020–2024 5-year estimates. It is a ratio of two medians — a reasonable area benchmark, not the assessor's mill rate and not any one household's rate. Newly purchased homes are often reassessed to sale price, so a buyer's first bill can run above it. Data & method