Wisconsin Sales Tax Rates: Rock County

Wisconsin:

Rock County, Wisconsin Sales Tax Rate 2026 Up to 5.5%

The Rock County Sales Tax is 0.5%

A county-wide sales tax rate of 0.5% is applicable to localities in Rock County, in addition to the 5% Wisconsin sales tax.

None of the cities or local governments within Rock County collect additional local sales taxes.

Here's how Rock County's maximum sales tax rate of 5.5% compares to other counties around the United States:

Higher maximum sales tax than 87% of Wisconsin counties
Lower maximum sales tax than 90% of counties nationwide

Last updated June 2026

Tax Rates By City in Rock County, Wisconsin

The total sales tax rate in any given location can be broken down into state, county, city, and special district rates. Wisconsin has a 5% sales tax and Rock County collects an additional 0.5%, so the minimum sales tax rate in Rock County is 5.5% (not including any city or special district taxes). This table shows the total sales tax rates for all cities and towns in Rock County, including all local taxes.

City	Sales Tax Rate	Tax Jurisdiction
Janesville	5.5%	Rock
Beloit	5.5%	Rock
Edgerton	5.5%	Dane
Milton	5.5%	Jefferson
Evansville	5.5%	Green
Clinton	5.5%	Rock
Orfordville	5.5%	Rock
Janesville	5.5%	Janesville
Footville	5.5%	Rock
Hanover	5.5%	Rock
Beloit	5.5%	Beloit
Avalon	5.5%	Rock
Afton	5.5%	Rock

Wisconsin Sales Tax Rates by Zip Code:

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Rock County, Wisconsin has a maximum sales tax rate of 5.5% and an approximate population of 132,251.

Sales tax rates in Rock County are determined by six different tax jurisdictions, Beloit, Dane, Green, Janesville, Jefferson and Rock.

Back to Wisconsin Sales Tax Handbook Sales tax rates for Rock County are current as of June 2026