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COUNTY · 2000 CENSUS

Grundy County

Illinois · 37,535 residents · 418.128 sq mi
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The short version

Grundy County is wealthier than most US places, with a median household income of $51,719. Population has grown 16% since 1990. 15% of adults hold a bachelor's degree or higher, below the national rate of 24%. Median home value has risen by half since 1990, reaching $125,300. Poverty is rare here, at 4.8% of residents.

At a glance
Wealthier
above the US median
US median: $42,589
Mid-age
median age 36.3
US median: 35.2
Less educated
15% hold a bachelor's degree
US average: 24%
Less affordable
home values up 33%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
37,535
+16%since 1990
from 32,337 in 1990
1990 – 2025
Median age
36.3
+9%since 1990
from 33.3 in 1990
US average: 35.2
Population, 1990 – 2024
30K37K43K49K55K1990201020202024Grundy County
202453K
1990201020202024
Age distribution, 2000
Under 56.6%(2,493)
US avg: 6.8%
5 to 97.3%(2,751)
US avg: 7.3%
10 to 147.8%(2,928)
US avg: 7.3%
15 to 197.6%(2,843)
US avg: 7.2%
20 to 245.6%(2,113)
US avg: 6.7%
25 to 3413.1%(4,912)
US avg: 14.2%
35 to 4417.1%(6,433)
US avg: 16%
45 to 5413.8%(5,174)
US avg: 13.4%
55 to 648.7%(3,281)
US avg: 8.6%
65 to 746.1%(2,292)
US avg: 6.5%
75 to 844.5%(1,698)
US avg: 4.4%
85 and over1.6%(617)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$51,719
+10%inflation adjusted, since 1990
from $35,728 in 1990
US average: $42,589
1990 – 2024
Per capita income
$22,591
+56%since 1990
from $14,474 in 1990
US average: $21,522
Poverty rate
4.8%
−1.8 ptssince 1990
from 6.6% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$125,300
+33%inflation adjusted, since 1990
from $71,300 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$602
+11%inflation adjusted, since 1990
from $410 in 1990
US average: $602
Owner-occupied
72.4%
+2.6 ptssince 1990
from 69.8% in 1990
27.6% rent
RELATED:See current rent listings in Grundy County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic98.5%(31,858)
Black0%(11)
Hispanic / Latino2.5%(801)
Asian0.3%(91)
2000
White, non-Hispanic94.6%(35,502)
Black0.2%(67)
Hispanic / Latino4.1%(1,552)
Asian0.3%(112)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican9.4%(5,012)
Puerto Rican1.8%(959)
Venezuelan0.2%(130)
Colombian0.1%(54)
Uruguayan0.1%(39)
Cuban0%(4)
Asian origin
Asian Indian0.2%(126)
Filipino0.2%(115)
Chinese0%(18)
Thai0%(13)
Japanese0%(11)
Ancestry
German21.4%(11,382)
Irish14.4%(7,651)
Italian10.3%(5,477)
Polish9.9%(5,291)
English9.2%(4,904)
Norwegian4.9%(2,584)
American3.5%(1,862)
French1.9%(992)
Swedish1.7%(916)
Dutch1.5%(800)
Scottish1.4%(751)
Czech1.2%(650)
+ 35 more ancestry groups with data
Croatian1.1%(586)
Lithuanian0.9%(487)
Slovak0.8%(422)
Scotch-Irish0.6%(345)
Hungarian0.6%(302)
British0.4%(238)
Danish0.3%(178)
Austrian0.3%(146)
Welsh0.2%(108)
Arab0.2%(98)
Finnish0.2%(90)
Slovene0.2%(90)
Russian0.2%(84)
West Indian0.2%(84)
Bulgarian0.1%(74)
Belgian0.1%(69)
Palestinian0.1%(63)
Swiss0.1%(59)
Greek0.1%(55)
Serbian0.1%(41)
Jamaican0.1%(41)
Romanian0.1%(39)
Haitian0.1%(39)
Lebanese0.1%(33)
Ukrainian0%(18)
Canadian0%(17)
Ethiopian0%(14)
Latvian0%(11)
Kenyan0%(5)
Syrian0%(2)
RANKED:Largest German population · Largest Irish population · Largest Italian population · Largest Polish population · Largest Mexican population
Section 05

Education

Bachelor's degree or higher
15.2%
+2.7 ptssince 1990
from 12.5% in 1990
US average: 24.4%
High school or higher
86.9%
+7.9 ptssince 1990
from 79.0% in 1990
US average: 80.3%
Graduate degree
4.3%
+0.4 ptssince 1990
from 3.9% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
19.8 min
−11%since 1990
from 22.2 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married26.8%(3,888)
Married61.9%(8,983)
Widowed2.5%(370)
Divorced8.8%(1,275)
Women 15+
Never married18.4%(2,730)
Married60.7%(8,996)
Widowed11%(1,636)
Divorced9.8%(1,458)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Drill deeper

Places similar to Grundy County

Boone County
Pop 53,568
Garfield County
Pop 63,474
La Plata County
Pop 56,898
Eagle County
Pop 54,291
Places similar to Grundy County
Head to head

Compare Grundy County to nearby counties

GRUNDY COUNTY VS
Kendall County
Income$111,601+116%
Home value$322,400+157%
Population145,470+169%
SEE FULL COMPARISON →
GRUNDY COUNTY VS
Will County
Income$109,984+113%
Home value$319,600+155%
Population712,253+1218%
SEE FULL COMPARISON →
GRUNDY COUNTY VS
LaSalle County
Income$73,045+41%
Home value$161,900+29%
Population107,773+99%
SEE FULL COMPARISON →
GRUNDY COUNTY VS
Livingston County
Income$73,790+43%
Home value$142,200+13%
Population35,057−35%
SEE FULL COMPARISON →
Frequently asked

How many people live in Grundy County, Illinois?

Grundy County, Illinois has about 37,535 residents according to the 2000 Census.

What is the median household income in Grundy County, Illinois?

The typical household in Grundy County, Illinois earns about $51,719 a year. Half of households make more than that, and half make less.

Is Grundy County, Illinois expensive?

In Grundy County, Illinois, the median home is worth about $125,300, and the typical rent is about $602 a month.

How educated are people in Grundy County, Illinois?

About 15.2% of adults age 25 and over in Grundy County, Illinois hold a bachelor's degree or higher.

What is the poverty rate in Grundy County, Illinois?

About 4.8% of people in Grundy County, Illinois live below the federal poverty line.

Has Grundy County, Illinois grown since 1990?

Yes, Grundy County, Illinois has grown since 1990. The population has added about 5,198 residents, a change of about 16 percent over that period.

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10 census tracts
Census Tract 1.02Census Tract 1.03Census Tract 2Census Tract 7Census Tract 4Census Tract 8Census Tract 3Census Tract 9Census Tract 5Census Tract 6
8 ZIP codes
ZIP 60450ZIP 60416ZIP 60424ZIP 60444ZIP 60407ZIP 60479ZIP 60474ZIP 60437
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →