Home and mortgage
St. Clair County, IL Property Tax Calculator
St. Clair County homeowners pay a median $3,665 a year in property tax, 2.03% of a median $180,300 home: above Illinois's 2.01% and the national 0.94%.
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Property tax in St. Clair County by home value, at 2.03%
| Home value | A year | A month |
|---|---|---|
| $90,000 | $1,830 | $152 |
| $140,000 | $2,846 | $237 |
| $180,000 | $3,659 | $305 |
| $270,000 | $5,489 | $457 |
| $360,000 | $7,319 | $610 |
St. Clair County against Illinois and the US
| Effective rate | Median tax | Median home value | Median household income | |
|---|---|---|---|---|
| St. Clair County | 2.03% | $3,665 | $180,300 | $73,854 |
| Illinois | 2.01% | $5,298 | $263,300 | $83,390 |
| United States | 0.94% | $3,119 | $332,700 | $80,734 |
How this calculator works
Median real estate taxes paid ÷ median home value in St. Clair County, from the Census Bureau's American Community Survey 2020–2024 5-year estimates. The calculator starts at the county's median home value and rate.
Questions people ask
What is the property tax rate in St. Clair County?
The effective rate is 2.03%: a median $3,665 a year on a median $180,300 home. That's the 20th highest of the 28 Illinois counties we cover.
How much is property tax on a $400,000 house in St. Clair County?
About $8,132 a year, $678 a month, at the county's effective rate, before any exemption.
How does St. Clair County compare with the rest of Illinois?
Its rate is above the state's 2.01%. Across Illinois, covered counties range from 1.58% to 2.58%.
How do I lower my St. Clair County property tax?
Apply for every exemption you qualify for, such as a homestead exemption, and appeal your assessment if it is higher than comparable homes sold nearby; the county assessor explains the deadlines.
Other Illinois counties
- Lake County
- DeKalb County
- Winnebago County
- Kendall County
- McHenry County
- Rock Island County
- Kane County
- Will County
- Peoria County
- Kankakee County
- Boone County
- McLean County
- Macon County
- LaSalle County
- Tazewell County
- Champaign County
- Ogle County
- DuPage County
- Whiteside County
- Grundy County
- Sangamon County
- Madison County
- Cook County
- Jackson County
- Vermilion County
- Williamson County
- Adams County
Related calculators
Sources
Updated by the RateHerald team. The maths is tested against worked examples; report a problem.