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COUNTY · 2000 CENSUS

Grundy County

Illinois · 37,535 residents · 418 sq mi
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The short version

Grundy County is home to 37,535 people in Illinois. 15% of adults hold a bachelor's degree or higher. Poverty is uncommon here, at 4.8% of locals. Owners hold 72% of the housing stock. 5,198 more people live here than in 1990. The median household earns $51,719, about 21% above the national median.

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

37,535
+16%since 1990
from 32,337 in 1990
1990 – 2025
36.3
+9%since 1990
from 33.3 in 1990
US average: 35.2
Land area
418 sq mi
Population, 19902024
30K37K43K49K55K19902000201020202024Grundy 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

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

Housing

$125,300
+33%inflation adjusted, since 1990
from $71,300 in 1990
US average: $120,530
1990 – 2024
$602
+11%inflation adjusted, since 1990
from $410 in 1990
US average: $602
72.4%
+2.6 ptssince 1990
from 69.8% in 1990
27.6% rent
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)
Section 05

Education

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%
4.3%
+0.4 ptssince 1990
from 3.9% in 1990
US average: 8.8%
Section 06

Commute & transportation

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
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

3.4%
−5.2 ptssince 2013
from 8.6% in 2013
US average: 8.4%
68.8%
−1.9 ptssince 2020
from 70.7% in 2020
US average: 54.8%
Direct-purchase
13.9%
+2.5 ptssince 2020
from 11.4% in 2020
US average: 13.8%
15.5%
+0.5 ptssince 2020
from 15.0% in 2020
US average: 18.4%
13.9%
−0.1 ptssince 2020
from 14.0% in 2020
US average: 20.9%
VA health care
1.8%
−0.1 ptssince 2020
from 1.9% in 2020
US average: 2.2%
Any private
80.1%
+0.9 ptssince 2020
from 79.2% in 2020
US average: 67.1%
Any public
28.8%
−0.1 ptssince 2020
from 28.9% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)33.8%(965)
US avg: 26.4%
Gulf War (1990s)22%(627)
US avg: 24.3%
Vietnam era30.2%(861)
US avg: 33.1%
Korean War1.8%(51)
US avg: 4.5%
World War II0%(1)
US avg: 1%

Share of the 2,854 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

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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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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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