Waukesha County in Wisconsin has a combined sales tax rate of 5.5% as of 2026. This includes the state rate of 5% plus a local county rate of 0.5%. With a population of 406,978, Waukesha County represents a significant market for businesses.
For a $500 purchase in Waukesha County, the sales tax would be $27.50, bringing the total to $527.50.
Business Compliance in Waukesha County
Businesses must register with the Wisconsin Department of Revenue to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 406,978, Waukesha County offers significant market potential for businesses of all sizes.