Grundy County, IA Population

Overview

12,336

Total Population

42.0

Median age

50.38%

Female population %

98.5:100

Gender ratio (M:F)

55-59 years

Largest age group

66.7

Total dependency ratio

White

Largest racial group

185

Hispanic population

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

TABLE OF CONTENTS

Age

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

The median age in Grundy County is 42.0, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Grundy County's population under 18 was 23.53%, compared to the 22.51% nationwide.
Grundy County's elderly or the senior population (over 65 age) was 20.45% as compared to 16.04% nationwide.
Of the total population in Grundy County, 19.55% were under the age of 15, 16.16% aged 15 to 29, 43.83% aged 30 to 64, 17.79% aged 65 to 84, and 2.67% were 85 years of age and older.

There are 94 more females than males in Grundy County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.38% females and 49.62% males in Grundy County, IA.
The Grundy County, IA gender ratio is 98.5:100 i.e. 98.5 men to 100 women (0.985).
For male population, the largest age group is 5-9 years with a population of 462.
For the female population, the largest age group is 10-14 years with a population of 525.

Grundy County's population has become increasingly diverse:

Racial distribution of Grundy County population: 97.01% are White, 0.72% are Black or African American, 0.11% are American Indian and Alaska Native, 0.35% are Asian, 0.70% are some other race and 1.12% are multiracial.
Grundy County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 185 is Hispanic or Latino (of any race), and 12,151 (98.50% of the total population) is Non-Hispanic.
The largest racial group in Grundy County is White with a population of 11,967 (97.01% of the total population).

Grundy County's population has already reached its peak and is showing a trend of decline:

The peak population was 12,478 in the year 2011
From 2000 to 2010, Grundy County's population increased by 107 (0.87%), as compared to the national growth of 9.63%.
From 2010 to 2020, Grundy County's population decreased by 130 (1.04%), 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 2007 at 12,151.