Tax Rates By City in Dodge 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 5.00% sales tax and Dodge County collects an additional 0.50%, so the minimum sales tax rate in Dodge 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 Dodge County, including all local taxes.