Contra Costa County, CA vs Rock Island County, IL
Property Tax Rate Comparison 2025
Quick Answer
Contra Costa County, CA: 0.72% effective rate · $5,433/yr median tax · median home $754,593
Rock Island County, IL: 1.66% effective rate · $4,811/yr median tax · median home $289,874
Side-by-Side Comparison
| Metric | Contra Costa County, CA | Rock Island County, IL | National Avg |
|---|---|---|---|
| Effective Tax Rate | 0.72% | 1.66% | 1.06% |
| Median Annual Tax | $5,433 | $4,811 | $2,778 |
| Median Home Value | $754,593 | $289,874 | $268,728 |
| Population | 1,165,927 | 147,546 | — |
Contra Costa County, CA
- Effective Rate
- 0.72%
- Median Annual Tax
- $5,433
- Median Home Value
- $754,593
- Population
- 1,165,927
Rock Island County, IL
- Effective Rate
- 1.66%
- Median Annual Tax
- $4,811
- Median Home Value
- $289,874
- Population
- 147,546
Frequently Asked Questions
What is the property tax difference between Contra Costa County and Rock Island County?
Contra Costa County, CA has an effective property tax rate of 0.72% with a median annual tax of $5,433. Rock Island County, IL has a rate of 1.66% with a median annual tax of $4,811. The difference is 0.94 percentage points.
Which county has higher property taxes, Contra Costa County or Rock Island County?
Rock Island County, IL has the higher effective property tax rate at 1.66% compared to 0.72%.
How do Contra Costa County and Rock Island County compare to the national average?
The national average effective property tax rate is 1.06%. Contra Costa County is below average at 0.72%, and Rock Island County is above average at 1.66%.