Online Calculators since 2009
Williamson County in Illinois has a tax rate of 7.25% for 2020, this includes the Illinois Sales Tax Rate of 6.25% and Local Sales Tax Rates in Williamson County totaling 1%. You can find more tax rates and allowances for Williamson County and Illinois in the 2020 Illinois Tax Tables.
Illinois has 802 seperate areas each with their own Sales Tax rates with the lowest Sales Tax rate in Illinois being 6.25% and the highest Sales Tax rate in Illinois at 10%.
Sales Tax in Williamson County, Illinois is calculated using the following formula:
You can calculate Sales Tax manually using the formula or use the Williamson County Sales Tax Calculator or compare Sales Tax between different locations within Illinois using the Illinois State Sales Tax Comparison Calculator.