For 2026, the sales tax rate in Pennington County, South Dakota stands at 6.5% — a combination of the 4.5% state rate and 2% local levy. The county's 113,775 residents make it an important market in the region.
For a $500 purchase in Pennington County, the sales tax would be $32.50, bringing the total to $532.50.
Business Compliance in Pennington County
Businesses must register with the South Dakota Department of Revenue to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 113,775, Pennington County offers significant market potential for businesses of all sizes.