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County tax profile · 2026 · Census ACS + IRS data

Property Tax & Income in St. Tammany Parish, Louisiana

St. Tammany Parish has an effective property tax rate of 0.71%. On the median home value of $284,000, that's roughly $2,028 per year. Median household income is $81,202.

Effective Property Tax Rate1
0.71%
median tax $2,028 ÷ median home $284,000
Median Home Value1
$284,000
owner-occupied
Median Household Income1
$81,202
per-capita $43,364
Est. Annual Tax on Median Home1
$2,028
at 0.71% effective rate

What you'll pay, at a glance

Property taxes are the largest local tax most homeowners pay. The effective rate measures the real tax bill as a share of home value — a more useful number than the nominal “mill rate,” because assessment practices vary county to county.

MetricSt. Tammany ParishLouisiana (state context)
Effective property tax rate10.71%0.44%
Median home value1$284,000—
State income tax3top rate 3.00%top rate 3.00%
State sales tax310.13% combined10.13% combined

How this is calculated

The effective property tax rate is the median real-estate tax bill divided by the median home value — both for owner-occupied homes, from the U.S. Census Bureau's American Community Survey (ACS 5-year estimates)1. Median income is also from the ACS1. Federal and state income-tax figures use IRS2 and Tax Foundation3 data.

About St. Tammany Parish, LA

St. Tammany Parish carries an effective property tax rate of 0.714%, well above Louisiana's statewide median of 0.438% and ranking second among the state's 64 counties. That places the parish near the top of Louisiana for property taxation, though it still sits below the national median of 0.794%. A median home value of $284,000 produces an annual real-estate tax bill of about $2,028, set against a median household income of $81,202 and per-capita income of $43,364. Slidell anchors the parish among its principal communities. The picture that emerges is a parish taxing at a higher clip than most of its state peers while remaining roughly in line with national norms — a signal that local levies, not necessarily home values alone, drive the higher in-state ranking.

Frequently asked questions

What is the property tax rate in St. Tammany Parish, LA?
The effective rate is 0.71% — meaning the median tax bill equals about 0.71% of the median home value.
How much are property taxes on a median home?
On the median home ($284,000), the estimated annual bill is about $2,028.
Is St. Tammany Parish's rate high or low?
Compare it to the state median of 0.44% and the national average near 1.1%.
How does the effective rate differ from my mill rate?
A mill rate is the nominal levy per $1,000 of assessed value. The effective rate reflects what you actually pay after exemptions and assessments — it's the median tax bill as a share of median home value, so it better predicts your real cost.
Will a reassessment raise my tax bill?
Not necessarily. If your home's assessed value rises, your bill can go up, but only if the mill rate and exemptions stay flat. Contact the St. Tammany Parish assessor's office to review your current assessment.
Can I appeal my property tax assessment?
Yes. Most counties allow an appeal when you believe the assessed value exceeds the market value. File with the St. Tammany Parish assessor within the local deadline, typically with comparable sales as evidence.
Sources
[1] U.S. Census Bureau — ACS 5-Year (2023) — Median home value (B25077), median real-estate taxes (B25103), median household income (B19013), per-capita income (B19301).
[2] IRS — Statistics of Income — County income, AGI, and real-estate taxes paid.
[3] Tax Foundation — State income, sales, corporate, and estate/inheritance tax rates.