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Grundy County, IA Population by Age

The median age in Grundy County, IA is 41.6, as per 2018-2022 ACS 5 -Year Estimates. Of the total population, 19.39% were under the age of 15, 16.79% aged 15 to 29, 43.21% aged 30 to 64, 18.18% aged 65 to 84, and 2.43% were 85 years of age and older.
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By Neilsberg Research
Updated Jul 26, 2024

Grundy County, IA population age distributions

A complete breakdown of Grundy County's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.

Age Group Population % of Total Population
Under 5 years 699 5.66%
5 to 9 years 833 6.74%
10 to 14 years 863 6.99%
15 to 19 years 762 6.17%
20 to 24 years 614 4.97%
25 to 29 years 698 5.65%
30 to 34 years 673 5.45%
35 to 39 years 794 6.43%
40 to 44 years 722 5.85%
45 to 49 years 669 5.42%
50 to 54 years 757 6.13%
55 to 59 years 888 7.19%
60 to 64 years 833 6.74%
65 to 69 years 817 6.61%
70 to 74 years 546 4.42%
75 to 79 years 426 3.45%
80 to 84 years 457 3.7%
85 years and over 300 2.43%
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Grundy County, IA population by age group

Key stats
3,771
Population under 25 years
2,887
Population aged 25-44
3,147
Population aged 45-64
2,546
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022

FIGURE 1

Grundy County, IA population by age group.

The largest age group is 55 to 59 years with a population of 888 (7.19% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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The largest age group in Grundy County, IA was for the group of age 55 to 59 years with a population of 888 (7.19%), according to the 2018-2022 American Community Survey.

At the same time, the smallest age group in Grundy County, IA was the 85 years and over with a population of 300 (2.43%).

Grundy County, IA population by age cohort

To better understand the age distribution of Grundy County, IA's population, we divided it into the following 3 cohorts:

  • Children : Under the age of 18 years
  • Adults (working population): Between the age of 18 and 64 years
  • Seniors: 65 years and above

FIGURE 2

Grundy County, IA population by age cohort

The largest age group was 18 to 64 years with a population of 6,901 (55.87% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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Grundy County, IA population by age cohort

Here's the population for each of the three cohorts.

Age Group Population % of Total Population
Under 18 years 2,904 23.51%
18 to 64 years 6,901 55.87%
65 years and over 2,546 20.61%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Grundy County 's population under 18 was 23.51%, compared to the 22.11% nationwide.
  • Grundy County's working population (between 18 and 64) was 55.87%, compared to 61.36% nationwide.
  • Grundy County's elderly or the senior population (over 65 age) was 20.61% as compared to 16.53% nationwide.

Grundy County, IA population pyramid

Population pyramid for Grundy County, IA is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.

Key stats from our analysis of the Grundy County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Grundy County, IA, is 32.3.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Grundy County, IA, is 34.4.
  • Total dependency ratio for Grundy County, IA is 66.7.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Grundy County, IA is 2.9.

FIGURE 3

Grundy County, IA population pyramid

Grundy County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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Grundy County, IA population pyramid

Here's the Grundy County, IA's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 367 332 699
5 to 9 years 451 382 833
10 to 14 years 357 506 863
15 to 19 years 382 380 762
20 to 24 years 316 298 614
25 to 29 years 377 321 698
30 to 34 years 327 346 673
35 to 39 years 412 382 794
40 to 44 years 395 327 722
45 to 49 years 348 321 669
50 to 54 years 388 369 757
55 to 59 years 441 447 888
60 to 64 years 430 403 833
65 to 69 years 397 420 817
70 to 74 years 270 276 546
75 to 79 years 173 253 426
80 to 84 years 211 246 457
85 years and over 109 191 300
Exploring Grundy County's Diversity? Request Customized Data Now!

Things to know

What is the population of Grundy County, IA under 18?

Grundy County's population under the age of 18 is 2,904, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.51% of the total resident population of Grundy County, IA.

What is the aging population in Grundy County, IA?

Grundy County's population aged 65 years and above was 2,546. As per the U.S. Census Bureau's American Community Survey, this population is 20.61% of the entire population.

References

Datasets

Explore datasets by year of publication.
2024
Grundy County, IA Age Group Population Dataset: A Complete Breakdown of Grundy County Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the Grundy County population distribution across 18 age groups. It lists the population in each age group along with the percentage population relative of the total population for Grundy County. The dataset can be utilized to understand the population distribution of Grundy County by age. For example, using this dataset, we can identify the largest age group in Grundy County.

Key observations

The largest age group in Grundy County, IA was for the group of age 55 to 59 years years with a population of 888 (7.19%), according to the ACS 2018-2022 5-Year Estimates. At the same time, the smallest age group in Grundy County, IA was the 85 years and over years with a population of 300 (2.43%). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates

Age groups:

  • Under 5 years
  • 5 to 9 years
  • 10 to 14 years
  • 15 to 19 years
  • 20 to 24 years
  • 25 to 29 years
  • 30 to 34 years
  • 35 to 39 years
  • 40 to 44 years
  • 45 to 49 years
  • 50 to 54 years
  • 55 to 59 years
  • 60 to 64 years
  • 65 to 69 years
  • 70 to 74 years
  • 75 to 79 years
  • 80 to 84 years
  • 85 years and over

Variables / Data Columns

  • Age Group: This column displays the age group in consideration
  • Population: The population for the specific age group in the Grundy County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Grundy County total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Grundy County Population by Age. You can refer the same here

Grundy County, IA Age Cohorts Dataset: Children, Working Adults, and Seniors in Grundy County - Population and Percentage Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the Grundy County population by age cohorts (Children: Under 18 years; Working population: 18-64 years; Senior population: 65 years or more). It lists the population in each age cohort group along with its percentage relative to the total population of Grundy County. The dataset can be utilized to understand the population distribution across children, working population and senior population for dependency ratio, housing requirements, ageing, migration patterns etc.

Key observations

The largest age group was 18 to 64 years with a poulation of 6,901 (55.87% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Age cohorts:

  • Under 18 years
  • 18 to 64 years
  • 65 years and over

Variables / Data Columns

  • Age Group: This column displays the age cohort for the Grundy County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Grundy County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Grundy County is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Grundy County Population by Age. You can refer the same here

Grundy County, IA Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Grundy County, IA population pyramid, which represents the Grundy County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates. It lists the male and female population for each age group, along with the total population for those age groups. Higher numbers at the bottom of the table suggest population growth, whereas higher numbers at the top indicate declining birth rates. Furthermore, the dataset can be utilized to understand the youth dependency ratio, old-age dependency ratio, total dependency ratio, and potential support ratio.

Key observations

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Grundy County, IA, is 32.3.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Grundy County, IA, is 34.4.
  • Total dependency ratio for Grundy County, IA is 66.7.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Grundy County, IA is 2.9.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Age groups:

  • Under 5 years
  • 5 to 9 years
  • 10 to 14 years
  • 15 to 19 years
  • 20 to 24 years
  • 25 to 29 years
  • 30 to 34 years
  • 35 to 39 years
  • 40 to 44 years
  • 45 to 49 years
  • 50 to 54 years
  • 55 to 59 years
  • 60 to 64 years
  • 65 to 69 years
  • 70 to 74 years
  • 75 to 79 years
  • 80 to 84 years
  • 85 years and over

Variables / Data Columns

  • Age Group: This column displays the age group for the Grundy County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Grundy County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Grundy County for the selected age group is shown in the following column.
  • Total Population: The total population of the Grundy County for the selected age group is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for Grundy County Population by Age. You can refer the same here

If you're looking for datasets from another year, please feel free to contact us at research@neilsberg.com and we'll be happy to assist you further.

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Collection 5 Resources