For 2026, the sales tax rate in Madison County, Illinois stands at 7.6% — a combination of the 6.25% state rate and 1.35% local levy. The county's 270,000 residents make it an important market in the region.
For a $500 purchase in Madison County, the sales tax would be $38.00, bringing the total to $538.00.
Business Compliance in Madison County
Businesses must register with the Illinois Department of Revenue to collect and remit sales tax. Filing frequency depends on sales volume. With a population of 270,000, Madison County offers significant market potential for businesses of all sizes.