Grundy County, IL Population

Overview

52,364

Total Population

38.3

Median age

49.88%

Female population %

100.5:100

Gender ratio (M:F)

5-9 years

Largest age group

52.6

Total dependency ratio

White

Largest racial group

5,506

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Grundy County's population is young compared to the rest of the country:

The median age in Grundy County is 38.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Grundy County's population under 18 was 25.25%, compared to the 22.51% nationwide.
Grundy County's elderly or the senior population (over 65 age) was 13.89% as compared to 16.04% nationwide.
Of the total population in Grundy County, 20.59% were under the age of 15, 19.04% aged 15 to 29, 46.48% aged 30 to 64, 12.31% aged 65 to 84, and 1.58% were 85 years of age and older.

There are 126 less females than males in Grundy County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.88% females and 50.12% males in Grundy County, IL.
The Grundy County, IL gender ratio is 100.5:100 i.e. 100.5 men to 100 women (1.005).
For male population, the largest age group is 5-9 years with a population of 2,004.
For the female population, the largest age group is 40-44 years with a population of 1,915.

Grundy County's population has become increasingly diverse:

Racial distribution of Grundy County population: 91.59% are White, 1.27% are Black or African American, 0.06% are American Indian and Alaska Native, 0.74% are Asian, 0.05% are Native Hawaiian and other Pacific Islander, 2.32% are some other race and 3.96% are multiracial.
Grundy County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 5,506 is Hispanic or Latino (of any race), and 46,858 (89.49% of the total population) is Non-Hispanic.
The largest racial group in Grundy County is White with a population of 47,962 (91.59% of the total population).

Grundy County's population has not reached its peak yet and is showing a trend of further growth:

The peak population was 53,041 in the year 2022
From 2000 to 2010, Grundy County's population increased by 12,480 (33.13%), as compared to the national growth of 9.63%.
From 2010 to 2020, Grundy County's population increased by 2,362 (4.71%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Grundy County's population was lowest in year 2000 at 37,675.