Sales tax in St. Clair County, Illinois
There is no single sales tax rate in St. Clair County. It runs from 6.6% to 9.85% depending on the exact address, because cities and special districts inside the county levy their own on top of the 6.25% state rate. The 6.25% state rate applies everywhere in the county; everything above that depends on where you are standing. These rates were read from Illinois's own published schedule and checked on September 9, 2026. The rate in each of the 33 cities is in the table below.
What is the sales tax rate in St. Clair County?
| Illinois state rate | 6.25% |
|---|---|
| St. Clair County rate | 0.25% |
| Lowest combined rate in the county | 6.6% |
| Highest combined rate in the county | 9.85% |
The combined figures are the lowest and highest totals anywhere in St. Clair County, so the rows above do not add up to them.
What is the sales tax rate in each city in St. Clair County?
Illinois publishes the rate for every city it taxes. These are the combined rates, state and local together, as listed in Illinois's own rate file. Where a city shows a range, a special district covers only part of it, so the rate depends on the exact address.
| City | August 1, 2026 to present |
|---|---|
| AlortonRates in Alorton run from 7.6% to 8.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not. | 7.6% to 8.35% |
| BellevilleRates in Belleville run from 7.35% to 9.1%: 8.1% where the Metro-East Mass Transit District tax applies and 7.35% where it does not, outside any business district; 9.1% where the Metro-East Mass Transit District tax applies and 8.35% where it does not, inside the 6401 West Main Street Marketplace Business District; 9.1% where the Metro-East Mass Transit District tax applies and 8.35% where it does not, inside the Carlyle/Green Mount Business District; 9.1% where the Metro-East Mass Transit District tax applies and 8.35% where it does not, inside the Frank Scott Parkway Business District; 9.1% where the Metro-East Mass Transit District tax applies and 8.35% where it does not, inside the Route 15 North Business District; 9.1% where the Metro-East Mass Transit District tax applies and 8.35% where it does not, inside the Shopland Plaza Business District. | 7.35% to 9.1% |
| BrooklynRates in Brooklyn run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| CahokiaRates in Cahokia run from 7.6% to 8.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not. | 7.6% to 8.35% |
| Cahokia HeightsRates in Cahokia Heights run from 7.6% to 9.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, outside any business district; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside the Centreville Business District. | 7.6% to 9.35% |
| CaseyvilleRates in Caseyville run from 6.6% to 8.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not, outside any business district; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Caseyville Business District #2; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Caseyville I-64 Business District; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Route 159 Business District. | 6.6% to 8.35% |
| CentrevilleRates in Centreville run from 7.6% to 8.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not. | 7.6% to 8.35% |
| CollinsvilleRates in Collinsville run from 8.1% to 9.85%: 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, outside any business district; 9.85% where the Metro-East Mass Transit District tax applies and 9.1% where it does not, inside the Southwest Corridors Business District. | 8.1% to 9.85% |
| DupoRates in Dupo run from 6.6% to 8.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not, outside any business district; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Dupo Business District. | 6.6% to 8.35% |
| East CarondeletRates in East Carondelet run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| East St. LouisRates in East St. Louis run from 8.1% to 9.85%: 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, outside any business district; 9.85% where the Metro-East Mass Transit District tax applies and 9.1% where it does not, inside the State Street Business District. | 8.1% to 9.85% |
| Fairmont CityRates in Fairmont City run from 6.6% to 8.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not, outside any business district; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside a business district. The Department lists business district addresses such as 2723 N 38th St or 2618 N 35th St. | 6.6% to 8.35% |
| Fairview HeightsRates in Fairview Heights run from 7.6% to 9.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, outside any business district; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside the Shoppes at St Clair Square Business District; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside a business district. The Department lists business district addresses such as 6208 N Illinois St or 5902 N Illinois St. | 7.6% to 9.35% |
| Fayetteville | 6.6% |
| FreeburgRates in Freeburg run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| Glen ViewRates in Glen View run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| Hecker | 6.6% |
| LebanonRates in Lebanon run from 7.1% to 8.85%: 7.85% where the Metro-East Mass Transit District tax applies and 7.1% where it does not, outside any business district; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside a business district. The Department lists business district addresses such as 111 W Saint Louis St or 402 S Madison St. | 7.1% to 8.85% |
| Lenzburg | 6.6% |
| MadisonRates in Madison run from 6.6% to 8.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not, outside any business district; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Madison - Gateway Business District. | 6.6% to 8.35% |
| Marissa | 6.6% |
| MascoutahRates in Mascoutah run from 6.85% to 8.6%: 7.6% where the Metro-East Mass Transit District tax applies and 6.85% where it does not, outside any business district; 8.6% where the Metro-East Mass Transit District tax applies and 7.85% where it does not, inside the Mascoutah Business District. | 6.85% to 8.6% |
| MillstadtRates in Millstadt run from 6.6% to 7.6%: 6.6% outside any business district; 7.6% inside the Market Place Business District. | 6.6% to 7.6% |
| New AthensRates in New Athens run from 7.1% to 8.1%: 7.1% outside any business district; 8.1% inside the New Athens Business District. | 7.1% to 8.1% |
| New BadenRates in New Baden run from 7.1% to 8.85%: 7.85% where the Metro-East Mass Transit District tax applies and 7.1% where it does not, outside any business district; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside the Interstate 64 Business District; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside the New Baden Business District Ii. | 7.1% to 8.85% |
| O'FallonRates in O'Fallon run from 7.6% to 9.35%: 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, outside any business district; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside the Central Park/Green Mount Business District; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside the Regency Park Business District; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside the Route 50/Scott-Troy Road Business District; 9.35% where the Metro-East Mass Transit District tax applies and 8.6% where it does not, inside the W. Highway 50/Cambridge Boulevard Business District. | 7.6% to 9.35% |
| Saint Libory | 6.6% |
| SaugetRates in Sauget run from 6.85% to 7.6%: 7.6% where the Metro-East Mass Transit District tax applies and 6.85% where it does not. | 6.85% to 7.6% |
| ShilohRates in Shiloh run from 6.6% to 8.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not, outside any business district; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Green Mount Business District; 8.35% where the Metro-East Mass Transit District tax applies and 7.6% where it does not, inside the Villages at Wingate Business District; 7.85% where the Metro-East Mass Transit District tax applies and 7.1% where it does not, inside a business district. The Department lists business district addresses such as 3506 Lebanon Ave or 3512 Lebanon Ave. | 6.6% to 8.35% |
| SmithtonRates in Smithton run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| SummerfieldRates in Summerfield run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| SwanseaRates in Swansea run from 7.1% to 8.85%: 7.85% where the Metro-East Mass Transit District tax applies and 7.1% where it does not, outside any business district; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside the Illinois Route 159/Boul Avenue Business District; 8.85% where the Metro-East Mass Transit District tax applies and 8.1% where it does not, inside the North Illinois Street Business District. | 7.1% to 8.85% |
| Washington ParkRates in Washington Park run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
| Unincorporated St. Clair CountyRates in Unincorporated St. Clair County run from 6.6% to 7.35%: 7.35% where the Metro-East Mass Transit District tax applies and 6.6% where it does not. | 6.6% to 7.35% |
Source: Illinois rate file for August 1, 2026 to present, from Illinois's official rate page.
How much sales tax is that on a purchase in St. Clair County?
At 6.6%, a $100 purchase carries $6.60 in sales tax and a $1,000 purchase $66.00, at the lowest rate in the county. At the highest, 9.85%, the same purchases carry $9.85 and $98.50. That is general merchandise; Illinois taxes some categories, often groceries, differently, as the note below explains.
Among Illinois's 102 counties, St. Clair County's lowest rate ranks 79th highest, level with 1 other county. See every Illinois county.
Sales tax in counties next to St. Clair County
St. Clair County borders 7 counties, 2 of them in another state. The lowest rate next door is 6.25% in Clinton County, IL, which is $3.50 less on a $1,000 purchase than the lowest rate in St. Clair County.
| County | Combined sales tax |
|---|---|
| St. Louis city, MO | 9.679% to 11.679% |
| St. Louis County, MO | 7.738% to 13.238% |
| Monroe County, IL | 7.5% to 8.5% |
| Randolph County, IL | 7.25% to 8.25% |
| Madison County, IL | 6.6% to 9.35% |
| St. Clair County, IL (this county) | 6.6% to 9.85% |
| Clinton County, IL | 6.25% to 8.25% |
| Washington County, IL | 6.25% to 7.25% |
Why the rate here is not the whole story
Illinois charges 6.25 percent statewide on general merchandise. Only 5 percent of that is kept by the state and 1.25 percent is passed straight through to the municipality or county where the sale is sourced, but the whole 6.25 percent is imposed by the state and every location in Illinois pays it. Municipalities, business districts and transit districts then add their own rates on boundaries that do not follow county lines, so a single rate for the whole county does not exist. The county itself levies 0.25 percent countywide. The Metro East Park and Recreation District levies 0.1 percent across the whole county, and the Metro East Mass Transit District levies more on top in the part of the county it covers, so part of the spread here is which transit district a seller sits in and not only which town. The floor of 6.6 percent is in unincorporated county. The ceiling of 9.85 percent is at Collinsville, and applies only at the specific addresses the state lists inside that municipality's business district. The state file carries a business district flag but no address rates for the St. Clair County portion of Columbia, so that one location is not reflected in the range here. These figures are general merchandise rates. Qualifying drugs and medical appliances are taxed at a lower rate that starts at 1 percent statewide, and since January 1 2026 groceries carry no state rate at all although a municipality or county may impose 1 percent of its own, so neither belongs in the range here.
How do I find the exact rate for an address in St. Clair County?
Use Illinois's own address lookup. In St. Clair County the rate depends on the address, anywhere from 6.6% to 9.85%.
Who has to collect sales tax in St. Clair County?
Any seller with a physical presence in Illinois collects at the rate for the address of the sale; a remote seller does once it passes Illinois's economic nexus threshold. Illinois sales tax covers the statewide rules and what is exempt.
Work out your own numbers
-
Sales tax calculator
Tax on a specific purchase at this county's rate, and the total you will actually pay.
-
Do you have to collect?
Whether your sales into Illinois cross its economic nexus threshold. A different question from the rate.
-
Property tax in St. Clair County
The other local tax: effective rate and median bill for this county.
-
Sales tax by county
Every US county, and how Illinois compares with the rest of the country.
Sources
- St. Clair County rates: Illinois Department of Revenue, Sales Tax Rate Machine Readable File for the Retailers' Occupation Tax, County/Municipality Rate file ordmache-current.txt read with the Addendum Address File ordmacha-current.txt, edition effective August 1 2026, https://tax.illinois.gov/research/taxrates/sales-tax-rate-machine-readable-files.html
- Collected and verified September 9, 2026. Confidence: S on the rate components, S on the range (P read on a primary agency page, S strong but indirect, U unverified).