St. Mary County
•
Louisiana (LA)
10 ZIP Code
St. Mary County, LA Sales Tax Rates 2026
2026 sales tax rate guide for St. Mary County, LA. Average combined tax rate is 9.53% with local jurisdictions ranging up to 10.25%.
Average Combined Rate
9.53%
Estimated Tax Range: 9.45% - 10.25%
⚡ Direct Tax Answer & Key Takeaway
As of 2026, the local county sales tax rate in St. Mary County (Louisiana) is 4.45%. Combined sales tax rates across cities in this county range from 9.45% to 10.25% (averaging 9.53%).
County Tax
4.45%
Average Combined Rate
9.53%
Max Local Rate
10.25%
Indexed Cities
9
Cities & Towns in St. Mary County
| City | Combined Sales Tax Rate | Action |
|---|---|---|
| Morgan City | 10.25% | View Tax Rates → |
| Patterson | 9.45% | View Tax Rates → |
| Berwick | 9.45% | View Tax Rates → |
| Amelia | 9.45% | View Tax Rates → |
| Charenton | 9.45% | View Tax Rates → |
| Centerville | 9.45% | View Tax Rates → |
| Sorrel | 9.45% | View Tax Rates → |
| Siracusaville | 9.45% | View Tax Rates → |
| Glencoe | 9.45% | View Tax Rates → |
📋 State Tax Rules & Compliance Guide
Sourcing Rule:
Destination-based
Groceries & Food:
Exempt (0% Tax)
Clothing & Apparel:
Taxable at standard rate
SaaS & Digital Goods:
Non-Taxable
Economic Nexus Threshold:
$100,000 in sales or 200 separate transactions
Official Tax Authority:
Louisiana Department of Revenue ↗
Interactive Sales Tax Calculator
Calculate exact sales tax and total purchase price instantly.
Address-Specific Rates
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Rates current for 2026
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ZIP Codes in St. Mary County
❓ Frequently Asked Questions
Key questions and answers regarding sales tax rates, exemptions, and compliance.