Grundy County, Illinois Population 2021

Grundy County, Illinois's estimated population is 51,216 with a growth rate of 0.16% in the past year according to the most recent United States census data. Grundy County, Illinois is the 28th largest county in Illinois. The 2010 Population was 50,154 and has seen a growth of 2.12% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202151,216810.16%
202051,135810.16%
201951,054810.16%
201850,9733510.69%
201750,6223050.61%
201650,317-46-0.09%
201550,363760.15%
201450,2871000.20%
201350,187270.05%
201250,160610.12%
201150,099-55-0.11%
201050,15417,81755.10%
199032,3371,7555.74%
198030,5824,04715.25%
197026,5354,18518.72%
196022,3503,13316.30%
195019,2178194.45%
194018,398-280-1.50%
193018,678980.53%
192018,580-5,582-23.10%
191024,162260.11%
190024,1363,11214.80%
189021,0244,29225.65%
188016,7321,79412.01%
187014,9384,55943.93%
186010,3797,356243.33%
18503,0230.00%
2021 Growth Rate
0.16%
Founded
February 17, 1841
County Seat
2010 Population
50,154
Growth Since 2010
2.12%
map placeholder

Grundy County, Illinois Population Growth

Population by Race

Race Population Percentage
White47,27693.31%
Some Other Race1,3082.58%
Two or More Races9221.82%
Black or African American6961.37%
Asian4100.81%
American Indian and Alaska Native350.07%
Native Hawaiian and Other Pacific Islander190.04%
Loading...

Grundy County, Illinois Population by Race

Grundy County, Illinois Population Pyramid $2021

Loading...

Grundy County, Illinois Median Age

37.9


Total

37.1


Male

39.1


Female

Grundy County, Illinois Adults

There are 37,785 adults, (6,881 of whom are seniors) in Grundy County, Illinois.

Grundy County, Illinois Age Dependency

63.9

Age Dependency Ratio

22.3

Old Age Dependency Ratio

41.7

Child Dependency Ratio

Grundy County, Illinois Sex Ratio

Female

25,353

50.04%

Male

25,313

49.96%

Grundy County, Illinois Population by Age

Grundy County, Illinois Renter vs Owner Occupied by Household Type

Loading...

Grundy County, Illinois Household Types

Type Owner Renter
Married82.7%17.3%
All71.3%28.7%
Non Family59%41%
Male52%48%
Female50.7%49.3%

71.3%

Rate of Home Ownership

Grundy County, Illinois Households and Families

Type Count Average Size Owned
All19,6762.5671.3
Married11,1373.1382.7
Non Family5,6601.1959
Female1,9653.0150.7
Male9143.0652

3.03

Average Family Size

2.56

Average Household Size

Loading...

Grundy County, Illinois Households by Type

Loading...
Education Attained Count Percentage
Less Than 9th Grade7172.12%
9th to 12th Grade1,5794.67%
High School Graduate11,41733.78%
Some College9,10726.95%
Associates Degree3,2229.53%
Bachelors Degree4,98814.76%
Graduate Degree2,7688.19%
Loading...

Grundy County, Illinois Educational Attainment by Sex (over 25)

Grundy County, Illinois Educational Attainment by Race

Loading...
Race Total High School Bachelors
White30,04328,6557,158
Hispanic2,6021,752286
Other Race58027828
Black46341178
2+ Races32832843
Asian301297185
Native American22206
Islander1919

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 61.46%.

Grundy County, Illinois Educational Attainment by Race

Loading...
Name Average Male Female
Overall$49,310$61,728$37,165
Less Than 9th Grade$34,886$41,833$30,304
High School Graduate$41,736$53,457$29,298
Some College$46,268$63,817$30,846
Bachelors Degree$60,249$77,224$47,275
Graduate Degree$67,354$75,000$65,388

$49,310

Average Earnings

$61,728

Average Male

$37,165

Average Female

Grundy County, Illinois Earnings by Educational Attainment

Grundy County, Illinois Language by Age

Loading...

Grundy County, Illinois Language

92.26% of Grundy County, Illinois residents speak only English, while 7.74% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 5.89% of the population.

Grundy County, Illinois Language

Grundy County, Illinois Poverty by Race

Loading...
Name Total In Poverty Poverty Rate
White43,1963,0597.08%
Hispanic5,0074809.59%
Other1,30820815.90%
Multiple91512713.88%
Black6658713.08%
Asian4108320.24%

7.61%

Overall Poverty Rate

5.58%

Male Poverty Rate

9.64%

Female Poverty Rate

Poverty in Grundy County, Illinois

The race most likely to be in poverty in Grundy County, Illinois is Asian, with 20.24% below the poverty level.

The race least likely to be in poverty in Grundy County, Illinois is White, with 7.08% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.92%. Among those working part-time, it was 8.52%, and for those that did not work, the poverty rate was 13.40%.

Grundy County, Illinois Poverty

Loading...
Name Poverty
Less Than 9th Grade10.66%
High School7.81%
Some College7.80%
Bachelors or Greater1.72%

Grundy County, Illinois Poverty Rate by Education

Loading...
Rate Poverty
Female Unemployed19.29%
Male Unemployed12.76%
Female Employed5.32%
Male Employed3.04%

Grundy County, Illinois Poverty Rate by Employment Status and Sex

Grundy County, Illinois Income by Household Type

Loading...
Name Median Mean
Households$77,350$91,384
Families$87,786$102,777
Married Families$98,432-
Non Families$47,023$58,789
Loading...

Income by Household Type

Grundy County, Illinois Marital Status

Loading...

Marriage Rates

57.4%

Overall Marriage Rate

58.4%

Male Marriage Rate

56.5%

Female Marriage Rate

Grundy County, Illinois Married by Age and Sex

Loading...

Grundy County, Illinois Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Grundy County, Illinois Marital Status by Race

Loading...

Grundy County, Illinois Marital Status

Loading...

2,990

Number of Veterans

2,825

Male Veterans

165

Female Veterans

War Veterans
Vietnam908
Second Gulf War627
First Gulf War555
Korea180
World War II61

Grundy County, Illinois Veterans by War

Loading...
Age Group Veterans
65 to 74762
35 to 54755
75+607
18 to 34453
55 to 64413

Grundy County, Illinois Veterans by Age

Loading...
Name Veterans % of Total
White2,9298.20%
Hispanic2668.35%
2+ Races389.74%
Black153.18%
Native American836.36%

Grundy County, Illinois Veterans by Race

Grundy County, Illinois Veterans by Education

Loading...

2.63%

Veteran Poverty Rate

19.39%

Veteran Disability Rate

Grundy County, Illinois Veterans by Education

Loading...

67.4%

Labor Force Participation

64.6%

Employment Rate

4.2%

Unemployment Rate

Grundy County, Illinois Employment by Age

Loading...

Grundy County, Illinois Employment by Race

Loading...

Grundy County, Illinois Employment by Education

Origin of Non-Citizens

Loading...

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Loading...

82.26%

Born in Grundy County, Illinois

96.12%

Native Born

3.88%

Foreign Born

1.67%

Non Citizen

2.21%

Naturalized

Place of Birth

96.12% of Grundy County, Illinois residents were born in the United States, with 82.26% having been born in Illinois. 1.67% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Grundy County, Illinois Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources