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Dewey County, SD Population by Age

The median age in Dewey County, SD is 27.1, as per 2018-2022 ACS 5 -Year Estimates. Of the total population, 32.48% were under the age of 15, 20.80% aged 15 to 29, 37.16% aged 30 to 64, 9.03% aged 65 to 84, and 0.55% were 85 years of age and older.
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By Neilsberg Research
Updated Jul 26, 2024

Dewey County, SD population age distributions

A complete breakdown of Dewey 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 580 11%
5 to 9 years 613 11.62%
10 to 14 years 520 9.86%
15 to 19 years 443 8.4%
20 to 24 years 327 6.2%
25 to 29 years 327 6.2%
30 to 34 years 295 5.59%
35 to 39 years 374 7.09%
40 to 44 years 249 4.72%
45 to 49 years 224 4.25%
50 to 54 years 242 4.59%
55 to 59 years 256 4.85%
60 to 64 years 320 6.07%
65 to 69 years 155 2.94%
70 to 74 years 177 3.36%
75 to 79 years 77 1.46%
80 to 84 years 67 1.27%
85 years and over 29 0.55%
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Dewey County, SD population by age group

Key stats
2,483
Population under 25 years
1,245
Population aged 25-44
1,042
Population aged 45-64
505
Population aged 65+

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

FIGURE 1

Dewey County, SD population by age group.

The largest age group is 5 to 9 years with a population of 613 (11.62% 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 Dewey County, SD was for the group of age 5 to 9 years with a population of 613 (11.62%), according to the 2018-2022 American Community Survey.

At the same time, the smallest age group in Dewey County, SD was the 85 years and over with a population of 29 (0.55%).

Dewey County, SD population by age cohort

To better understand the age distribution of Dewey County, SD'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

Dewey County, SD population by age cohort

The largest age group was 18 to 64 years with a population of 2,776 (52.63% of the total population).

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

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

Age Group Population % of Total Population
Under 18 years 1,994 37.8%
18 to 64 years 2,776 52.63%
65 years and over 505 9.57%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Dewey County 's population under 18 was 37.80%, compared to the 22.11% nationwide.
  • Dewey County's working population (between 18 and 64) was 52.63%, compared to 61.36% nationwide.
  • Dewey County's elderly or the senior population (over 65 age) was 9.57% as compared to 16.53% nationwide.

Dewey County, SD population pyramid

Population pyramid for Dewey County, SD 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 Dewey County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Dewey County, SD, is 56.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Dewey County, SD, is 16.5.
  • Total dependency ratio for Dewey County, SD is 72.6.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Dewey County, SD is 6.1.

FIGURE 3

Dewey County, SD population pyramid

Dewey 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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Dewey County, SD population pyramid

Here's the Dewey County, SD's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 310 270 580
5 to 9 years 346 267 613
10 to 14 years 254 266 520
15 to 19 years 219 224 443
20 to 24 years 162 165 327
25 to 29 years 153 174 327
30 to 34 years 138 157 295
35 to 39 years 185 189 374
40 to 44 years 129 120 249
45 to 49 years 102 122 224
50 to 54 years 128 114 242
55 to 59 years 131 125 256
60 to 64 years 155 165 320
65 to 69 years 93 62 155
70 to 74 years 83 94 177
75 to 79 years 27 50 77
80 to 84 years 27 40 67
85 years and over 6 23 29
Exploring Dewey County's Diversity? Request Customized Data Now!

Things to know

What is the population of Dewey County, SD under 18?

Dewey County's population under the age of 18 is 1,994, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 37.80% of the total resident population of Dewey County, SD.

What is the aging population in Dewey County, SD?

Dewey County's population aged 65 years and above was 505. As per the U.S. Census Bureau's American Community Survey, this population is 9.57% of the entire population.

References

Datasets

Explore datasets by year of publication.
2024
Dewey County, SD Age Group Population Dataset: A Complete Breakdown of Dewey 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 Dewey 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 Dewey County. The dataset can be utilized to understand the population distribution of Dewey County by age. For example, using this dataset, we can identify the largest age group in Dewey County.

Key observations

The largest age group in Dewey County, SD was for the group of age 5 to 9 years years with a population of 613 (11.62%), according to the ACS 2018-2022 5-Year Estimates. At the same time, the smallest age group in Dewey County, SD was the 85 years and over years with a population of 29 (0.55%). 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 Dewey County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Dewey 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 Dewey County Population by Age. You can refer the same here

Dewey County, SD Age Cohorts Dataset: Children, Working Adults, and Seniors in Dewey 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 Dewey 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 Dewey 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 2,776 (52.63% 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 Dewey County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Dewey County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Dewey 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 Dewey County Population by Age. You can refer the same here

Dewey County, SD 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 Dewey County, SD population pyramid, which represents the Dewey 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 Dewey County, SD, is 56.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Dewey County, SD, is 16.5.
  • Total dependency ratio for Dewey County, SD is 72.6.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Dewey County, SD is 6.1.
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 Dewey County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Dewey County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Dewey County for the selected age group is shown in the following column.
  • Total Population: The total population of the Dewey 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 Dewey 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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