Waterloo, St. Clair County, Illinois Property Taxes
Median Waterloo, IL effective property tax rate: 2.20%, significantly higher than the national median of 1.02%, but lower than the Illinois state median of 2.35%.
Median Waterloo, IL home value: $162,369
Median annual Waterloo, IL tax bill: $3,289, $889 higher than the national median property tax bill of $2,400.
How are property taxes in St. Clair calculated?
Property taxes in Waterloo, IL are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Waterloo’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Waterloo, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Waterloo, St. Clair County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.2%
Estimate Property Tax Bill
$3,572
$3,315
Property Tax Rates Across Waterloo, St. Clair County, Illinois
Local government entities are responsible for setting tax rates, which can vary significantly across different areas. Each year, counties calculate the necessary budget to provide essential services and then divide that by the total assessed value of all taxable properties within their jurisdiction. This process determines the property tax rate. Although votes and legislation play a role in establishing tax rates and budgets, this annual calculation is the core of the process.
In Waterloo, located in Monroe County, Illinois, property tax rates reflect this process. With a median property tax rate of 2.20%, it stands out compared to the national median of 1.02%. This rate is also above the national median property tax bill of $2,400. When compared to other areas in Illinois, Waterloo shares the same median tax rate as the highest and lowest rates in the state, both at 2.20%. This indicates a consistent tax environment within the region. Understanding these rates and how they compare to national and state medians can help property owners make informed decisions regarding their investments and financial planning.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Waterloo Taxx Rate
2.20%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective St. Clair County Taxx Rate
2.55%
Median Effective Illinois Tax Rate
2.35%
Median Effective United States Tax Rate
0.99%
Property Tax Rates Across Waterloo, St. Clair County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
62298 | 1.63% | 1.96% | 2.20% | 2.47% | 2.66% |
Source: Ownwell
Property Tax Assessment Values Across Waterloo, St. Clair County, Illinois
When examining property taxes in Waterloo, Illinois, understanding the distinction between "market value" and "assessed value" is crucial. The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The St. Clair County appraisal district estimates the market value for tax purposes. The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
In St. Clair County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of April. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Waterloo. For example, the median home price in Waterloo is $162,369, with tax bills ranging significantly across the county. Zip code 62298 has the highest median home price at $162,369.
Property Tax Assessment Values Across Waterloo, St. Clair County, Illinois
Source: Ownwell

$15,501
$141,572
$267,642
Median Waterloo Market Value
$162,369
Median St. Clair County Market Value
$110,946
Median Illinois Market Value
$194,700
Median United States Market Value
$244,900
Property Tax Assessment Values Across Waterloo, St. Clair County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
62298 | $43,121 | $91,164 | $162,369 | $247,161 | $323,172 |
Source: Ownwell
Property Tax Bills Across Waterloo, St. Clair County, Illinois
Median Waterloo Tax Bill
$3,289
Median St. Clair County Tax Bill
$2,735
Median Illinois Tax Bill
$4,715
Median United States Tax Bill
$2,690
Property Tax Bills Across Waterloo, St. Clair County, Illinois
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
62298 | $819 | $1,799 | $3,289 | $5,392 | $7,174 |
Source: Ownwell