Illinois · County property tax · ACS 2024
Grundy County Property Taxes
The median homeowner in Grundy County pays $5,420 a year, an effective rate of 1.99%, far above the U.S. average.
- $5,420
- Median tax / yr · Highest-decile bill
- 1.99%
- Effective rate · Highest-decile rate
- +172%
- vs U.S. average
- #33 of 102
- rank in IL
The verdict
Homeowners in Grundy County pay a median $5,420 a year in property tax, an effective rate of 1.99%, more affordable than 3% of U.S. counties (Census ACS 2024).
- $5,420
- Median annual tax bill, 2024
- 1.99%
- Effective rate on median home
- #3047 of 3135
- U.S. counties by tax burden
- +172%
- vs the national average bill
Effective rate is the median property tax bill divided by the median home value ($271,700). U.S. Census Bureau, ACS 5-Year Estimates · 2024.
Census Bureau ACS property tax data for Illinois. Population: 53,219. Owner-occupied homes: 15,319.
The median annual property tax in Grundy County is $5,420, which is 2% higher than the Illinois state average and 172% above the national average. The effective tax rate is 1.99% on a median home value of $271,700. Property taxes represent 5.9% of the median household income in this county.
Why Grundy County's ACS bill runs high vs the U.S.
Primary signal
The bill sits well above the national median
Homeowners in Grundy County pay a median annual property tax of $5,420, far above the national median and roughly in line with the Illinois state median. On a $271,700 median home, that works out to an effective rate of 1.99% once the local assessment base and millage are combined.
Decision signal 2
Income carries a heavy tax share
Property taxes in Grundy County run a bit above the commonly cited 2%-4% national benchmark, at about 5.9% of the $92,235 median household income.
Decision signal 3
The effective rate is a national headwind
Grundy County's 1.99% effective rate is among the highest of 3,135 tracked counties: only about 97% pay more.
Decision signal 4
Near the middle of Illinois counties by effective rate
Grundy County ranks #33 of 102 counties in Illinois by effective rate (68% of in-state counties pay a lower rate).
Informational notice
Figures describe the median homeowner household in Grundy County as reported to the Census Bureau; your parcel can differ. Not tax, legal, or financial advice: check the county assessor or a qualified professional before decisions that depend on these numbers.
Most of the market's rise reached the bill
The effective rate here moved 6.9% down between 2020 and 2024, a smaller shift than in 72% of U.S. counties. With the median home value rose 36.0%, the median bill rose 26.5% to $5,420: the rate did comparatively little to offset the market.
Effective rate is the published median bill divided by the published median home value, so the two multiply back to the bill exactly; the rate's movement here is derived from those two figures rather than read from the rounded published rate. Both are ACS 5-year survey estimates for the median owner-occupied household, compared across non-overlapping releases. They describe what the Census published, not a local policy, assessment, or exemption change.
How to read this county's bill
The bill here climbed steeply over 2020-2024, up 27% from $4,283 to $5,420. These ACS medians describe the reported change; they do not identify whether a levy, assessment, home value, or change in the responding households caused it.
The heaviest band is also the fullest one here: 12,322 of 15,319 owner-occupied homes (80.4%) report annual real-estate taxes above $3,000. That band has no upper edge in the source, so the county median understates the burden carried by the plurality rather than describing it.
Both figures are in the national top quarter, and the median bill still equals only 5.9% of median household income. A high rate on high earnings produces a large dollar figure, and only the dollar figure tends to get quoted; the ratio above is the other half.
The share above is the median annual bill divided by median household income, a ratio of two county-level medians rather than a household-by-household figure.
What Grundy County Homeowners Actually Pay
The single largest group of Grundy County homeowners, 12,322 of 15,319 owner-occupied homes (80.4%), pays $3,000 or more a year. The median is one point in this spread, not a typical bill.
- Less than $800 4.7% (718)
- $800 to $1,499 2.3% (351)
- $1,500 to $1,999 1.5% (229)
- $2,000 to $2,999 8.8% (1,351)
- $3,000 or more 80.4% (12,322)
Census ACS 2024, table B25102. Bands and the no-tax share sum to 100%.
348 homes here (2.3%) report no real estate tax at all. Exemptions are set by state: how Illinois handles assessments and appeals.
With vs Without Mortgage
In Grundy County, mortgaged homeowners pay 28% more than those without a mortgage, a gap that typically tracks higher home values rather than a different tax rate.
Grundy County's bill vs state & U.S. medians
Median annual bill bars around Grundy County's SPIKE ACS 2024 figure.
Grundy County's median bill is 2% above the Illinois median and 172% above the U.S. median.
Among the highest-taxed counties in the country
At 1.99%, Grundy County sits in the top 3% of all U.S. counties by effective property-tax rate. That is the rate, not the bill: a high rate on a modest home can still produce a smaller cheque than a low rate on an expensive one, which is why the $5,420 median bill is the number to compare against another county.
Grundy County vs Benchmarks
| Metric | Grundy County | Illinois Avg | U.S. Avg |
|---|---|---|---|
| Median Annual Tax Highest-decile bill | |||
| Effective Tax Rate Highest-decile rate | |||
| Median Home Value | |||
| Tax as % of income Highest-decile income burden | 5.9% | - | - |
Source: U.S. Census Bureau, ACS 5-Year Estimates. Tax-burden differences across rows reflect millage decisions, assessment-ratio practices, and the residential-vs-commercial mix of each tax base.
Is Grundy County's $5,420 median bill appeal-worthy?
At Grundy County's $5,420 ACS median (SPIKE), a 10% assessment cut is worth about $542/yr before exemptions. Appeal Savings Estimator · appeal guide for Illinois.
Grundy County bill trail · SPIKE
| Year | Median Tax (vs prior release) | Effective Rate |
|---|---|---|
| 2024 | $5,420 +3.0% | 1.99% |
| 2023 | $5,260 +6.2% | 2.03% |
| 2022 | $4,953 +9.0% | 2.02% |
| 2021 | $4,543 +6.1% | 2.14% |
| 2020 | $4,283 | 2.14% |
Each row is a separate ACS 5-year release, and consecutive releases share four of their five survey years. The percentage beside each bill is therefore movement in the published estimate against the previous release, not a single year's tax change. The two releases largely describe the same households. For change over time, compare releases that do not overlap.
Grundy County: tax takes 5.9% of income
Counties near Grundy County's median bill
On effective rate, Grundy County sits nearest Capitol Planning Region (CT), McKinley County (NM), Clinton County (NY).
On published median-tax change, the nearest matches are Yellowstone County (MT), Putnam County (TN), Saginaw County (MI).
How peers are chosen
These are the nearest cross-state matches in the published Census data, not neighboring counties or recommendations. Peers are rebuilt with each data release; see the calculation method.
Similar effective rates
Similar published median-tax changes, 2020–2024
Grundy County: only 6% of returns show Schedule A real-estate tax
Tax year 2022: 1,620 of 26,520 returns from Grundy County reported real estate taxes, averaging $6,618 - 41% of those reporters sat in the $100-200k AGI band.
What this IRS county file does not say
Amounts are reported before the SALT cap, not deducted; the share is of filers, not homeowners. Source: IRS SOI county data, tax year 2022.
Other Counties in Illinois
Grundy County bill FAQs
- How does Grundy County property tax compare to the national average?
- Property taxes in Grundy County run far above the national median of $1,993, an effective rate of 1.99% versus 0.92% nationally.
- What is the average property tax in Grundy County, Illinois?
- The median annual property tax in Grundy County is $5,420, an effective rate of 1.99% on a $271,700 median home (Census ACS, 2024).
- What percentage of income goes to property taxes in Grundy County?
- Property taxes in Grundy County run a bit above the commonly cited 2%-4% national benchmark, at about 5.9% of the $92,235 median household income.
- Are property taxes increasing in Grundy County?
- The ACS median property-tax bill for Grundy County jumped 26.5% between the 2020 and 2024 5-year releases, from $4,283 to $5,420, a 4-year span. These are survey estimates covering five years each, so this compares the two releases furthest apart rather than consecutive ones, which overlap and would mostly measure the same households twice.
- What is the tax affordability score for Grundy County?
- Grundy County, Illinois scores F (5/100) on PlainPropertyTax's tax affordability composite across 5 Census ACS dimensions (effective rate, bill size, income share, mortgage gap, and home-value/income). Its strongest scored dimension here is housing pressure at D (2.95×). The score compares published county medians to U.S. percentiles, it is not a personal bill and not advice to buy, sell, appeal, or relocate.
What to do with Grundy County's SPIKE bill
Grundy County's $5,420 median bill sits well above the U.S. median - size a personal estimate before treating the county headline as your budget. Estimate your bill →
Income burden is elevated here: about 5.9% of Grundy County's $92,235 median household income goes to the property-tax bill.
Nationwide peers by median bill (then rate)
Bill-first peers for Grundy County's SPIKE median, then a disjoint out-of-state rate set, not the same-state geography lattice.
Similar effective rate
Nearest out-of-state counties by ACS effective rate. This county: 1.99%.
Similar median bill
Nearest out-of-state counties by ACS median annual tax. This county: $5,420/yr. Rate peers are excluded so the two link sets stay distinct.
Read with Grundy County
Nearest ABS(median_tax) ACS peers for Grundy County (PEAK · SPIKE), replacing the old fixed Keep exploring strip.
PEAK SPIKE
Newport County, RI
ABS(median_tax) peer · $5,414/yr (near-tied bill ABS $6); rate 0.89% vs Grundy County 1.99%.
Worcester County, MA
ABS(median_tax) peer · $5,438/yr (near-tied bill ABS $18); rate 1.28% vs Grundy County 1.99%.
Bronx County, NY
ABS(median_tax) peer · $5,447/yr (near-tied bill ABS $27); rate 1.03% vs Grundy County 1.99%.
Windsor County, VT
ABS(median_tax) peer · $5,458/yr (near-tied bill ABS $38); rate 1.84% vs Grundy County 1.99%.
Illinois county set
State ACS overview for every published Illinois county rate and median bill.
Appeal filing windows
Grundy County stamps PEAK · SPIKE - review notice deadlines before quoting the ACS median.
Data vintage and method
Data as of 2024. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates.
Property tax data reflects median amounts paid by homeowners. Effective rates are calculated as median tax divided by median home value.
Source: U.S. Census Bureau American Community Survey 5-Year Estimates, county median real-estate taxes · 2024 Grundy County (PEAK · SPIKE) - ACS medians, not a parcel bill.