Property Tax in LaSalle County, Illinois

What the LaSalle County numbers mean

The median is the midpoint of the county's actual bills: half of LaSalle County homeowners pay more than $3,336 a year and half pay less. The exact bill for any one home depends on its assessed value, exemptions, and which school, municipal and special districts cover it.

Set against the median home value of $154,900, the median bill works out to a derived effective rate of 2.15%. That rate is an estimate computed from the two medians — no county publishes a rate calculated this way — but it adjusts for home prices, which makes comparisons between counties more meaningful.

LaSalle County by the numbers

*Estimate derived from Census medians (tax ÷ value), not an official rate.

LaSalle County at a glance

• Median tax rank in Illinois: #25 of 102 counties
• Median home value rank in Illinois: #33 of 102
• Population rank in Illinois: #17 of 102 (109,049 residents)
• Population density rank: #23 of 102 (96 people per square mile)
• Land area rank in Illinois: #2 of 102 (1,135 sq mi, 2.0% of the combined county land area)
• Median tax as a monthly figure: $278; per $1,000 of home value: $2.15

How LaSalle County compares

Set against its state, LaSalle County's median bill of $3,336 is about 36% lower than the Illinois median ($5,189). Against the country as a whole it is about 12% higher than the US median ($2,969). That places the county #25 of 102 Illinois counties ranked by median taxes paid.

Remember what drives the ranking: bills follow home values as much as rates. LaSalle County's median home, at $154,900, ranks #33 by value in Illinois, while its derived rate of 2.15% compares with a derived US figure of 0.98%.

Some extra context for LaSalle County: the median bill works out to about $278 a month, and the derived rate equals roughly $2,154 of tax per $100,000 of home value. The county is home to 109,049 people — the #17 most populous county in Illinois, spread over 1,135 square miles, a density of about 96 people per square mile. Its median home value, $154,900, ranks #33 among the state's 102 counties with data.

Zooming out: of 3133 counties nationwide with published Census figures, only 357 record a higher median tax bill than LaSalle County — it sits in the top 11% nationally. The county holds roughly 0.9% of Illinois's people. Its homes are worth less than the state norm (median $154,900 versus $250,500), and a decade at the derived rate of 2.15% adds up to about 21.54% of the median home's value in tax. The cheapest county in the state, Pulaski County, medians $668 — $2,668 less than LaSalle County per year.

Counties nearest LaSalle County in the Illinois ranking

LaSalle County and its population peers

For a like-for-like sense of scale, compare LaSalle County with its national population peers: the counties nearest to its 109,049 residents, listed in the table below with their own Census medians. Of the 9 counties in that group, LaSalle County's median bill of $3,336 is #3 of 9.

The closest population match is Eaton County, Michigan (109,000 residents), where the median real estate tax paid is $2,924 on a median home value of $206,700 — $412 more than LaSalle County pays.

Staying within Illinois, the counties nearest LaSalle County by population are Kendall County (135,053 residents, median tax $7,556 on a median value of $298,900); Tazewell County (130,555 residents, median tax $3,481 on a median value of $164,500); Kankakee County (106,833 residents, median tax $4,125 on a median value of $185,700); Macon County (102,591 residents, median tax $2,560 on a median value of $121,800). The spread in their median bills — all under the same state framework — shows how much of the property tax burden is decided county by county and district by district.

How the tax is worked out

As an illustration of the arithmetic: at LaSalle County's derived rate of 2.15%, a home valued at $400,000 would carry a tax bill of roughly $8,616 a year. That is only an illustration using the derived rate — a real bill is computed from the property's assessed value, its exemptions, and the combined rates of its specific taxing districts, so it can be higher or lower.

The usual sequence is: the local assessor values the property; exemptions are applied; the taxable value is multiplied by the combined local rates; and the county bills and collects the tax, distributing it to the schools, municipalities and districts that levied it.

Illustrative bills in LaSalle County at the derived rate

The derived rate of 2.15% is only an estimate built from medians, but applying it to different home values gives a sense of scale for LaSalle County — and a quick way to compare with the state derived rate of 2.07% and the US figure of 0.98%:

Illustration only: real bills are computed from the assessed value, exemptions, and the combined rates of the property's actual taxing districts.

Checking your assessment in LaSalle County

If your bill looks wrong, work through these steps:

1. Get your property record card from the assessor and check the basics — living area, lot size, bedrooms, condition, and any exemptions you should have.
2. Compare your assessed value with recent sale prices of similar homes in LaSalle County.
3. Talk to the assessor's office informally first; clear errors are often fixed without a hearing.
4. If needed, file a formal appeal with the local review board before the deadline on your assessment notice, with your evidence attached.
5. Keep paying the bill as issued while the appeal runs, unless your notice says otherwise — unpaid taxes accrue penalties regardless of an appeal.

More Illinois counties

• Kankakee County, IL — $4,125
• Macon County, IL — $2,560
• DeKalb County, IL — $5,889
• Tazewell County, IL — $3,481
• Kendall County, IL — $7,556
• Rock Island County, IL — $3,372

Frequently asked questions