St. Tammany Parish in Louisiana has a combined sales tax rate of 9.2% as of 2026. This includes the state rate of 4.45% plus a local county rate of 4.75%. With a population of 264,570, St. Tammany Parish represents a significant market for businesses.
For a $500 purchase in St. Tammany Parish, the sales tax would be $46.00, bringing the total to $546.00.
Business Compliance in St. Tammany Parish
Businesses must register with the Louisiana Department of Revenue to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 264,570, St. Tammany Parish offers significant market potential for businesses of all sizes.