Illinois Sales Tax Rate by County and City

Counties (102)

The county rate applies outside any city that levies its own tax. Alphabetical.

Cities and towns (1126)

Inside city limits the city's tax applies on top of the county's. Alphabetical; the county shown is the one the DOR assigns to the city.

Methodology

How the combined rate is built

A sales tax rate is a sum. The state sets one rate for every sale in the state; the county, the city and any special district (transit authority, hospital district, improvement district) the address sits in each add their own. The combined rate is those components added together, and the page lists every one with the authority that levies it and the date it took effect, so the total can be checked line by line.

Combined rate  =  state rate + county rate + city rate + district rates
Tax            =  purchase amount × combined rate ÷ 100

Source and effective date

Every rate on this page comes from the Illinois Department of Revenue, Sales Tax Rate Machine Readable Files, the file dated August 1, 2026 with rates effective August 1, 2026, read on October 8, 2026. Each local component carries the effective date the file states for it; the state component is dated by the file's own effective date. Sales tax rates are not tax-year figures: they change on the first day of a quarter, most often January, April, July and October 1. The snapshot behind these pages is rebuilt from the DOR file on the fifth of those months.

• IDOR's file gives one general-merchandise rate per location. The county line here is the county's location rate less the state's 6.25% (it includes county-wide levies such as RTA transit); the municipal line is the municipality's rate less its county's.
• Municipalities whose IDOR rate is lower than their county's (9: Alhambra (Madison), Fayetteville (St. Clair), Hecker (St. Clair), Lenzburg (St. Clair), Marissa (St. Clair), New Douglas (Madison), Saint Libory (St. Clair), Williamson (Madison), Worden (Madison)) sit outside a county-wide levy; their local rate is shown as one combined line rather than split.
• Locations with a business-district address override (200 in the file) have no single rate and are left out; IDOR's address file is the source for those.

Limitations

• General merchandise only. Groceries, prepared food, lodging, motor vehicles, fuel, alcohol and services are taxed at different rates or not at all, and that differs by state and within Illinois.
• A ZIP code is not a jurisdiction. ZIP codes cross county, city and district lines, so a receipt's ZIP does not set the rate; the taxing jurisdictions the address sits in do. That is why there are no ZIP pages here.
• Where the rate is measured. Illinois is an origin-based state: for sales inside the state, the rate at the seller's location applies, not the buyer's.
• Special districts that cover part of a jurisdiction (an address-range improvement district, a transit area that stops at a road) are listed under "other rate areas" where the DOR lists them and left out where it lists them only by address.
• Caps and thresholds (a surtax that applies only to the first $5,000 of an item, a maximum tax per sale) are not modeled; the split assumes the full rate on the full amount.

Last reviewed: October 2026. The state table was checked against each revenue department's page on October 8, 2026; the local snapshots are refreshed from the DOR files every quarter and checked by scripts/check-sales-tax.mjs before each deploy.