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Aurora County, SD Population by Age

The median age in Aurora County, SD is 42.4, as per 2019-2023 ACS 5 -Year Estimates. Of the total population, 19.24% were under the age of 15, 19% aged 15 to 29, 40.82% aged 30 to 64, 17.65% aged 65 to 84, and 3.30% were 85 years of age and older.
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By Neilsberg Research
Updated Feb 22, 2025

Aurora County, SD population age distributions

A complete breakdown of Aurora 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 164 6.37%
5 to 9 years 143 5.56%
10 to 14 years 188 7.31%
15 to 19 years 184 7.15%
20 to 24 years 175 6.8%
25 to 29 years 130 5.05%
30 to 34 years 125 4.86%
35 to 39 years 106 4.12%
40 to 44 years 187 7.27%
45 to 49 years 154 5.99%
50 to 54 years 100 3.89%
55 to 59 years 192 7.46%
60 to 64 years 186 7.23%
65 to 69 years 209 8.12%
70 to 74 years 90 3.5%
75 to 79 years 91 3.54%
80 to 84 years 64 2.49%
85 years and over 85 3.3%
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Aurora County, SD population by age group

Key stats
854
Population under 25 years
548
Population aged 25-44
632
Population aged 45-64
539
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023

FIGURE 1

Aurora County, SD population by age group.

The largest age group is 65 to 69 years with a population of 209 (8.12% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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The largest age group in Aurora County, SD was for the group of age 65 to 69 years with a population of 209 (8.12%), according to the 2019-2023 American Community Survey.

At the same time, the smallest age group in Aurora County, SD was the 80 to 84 years with a population of 64 (2.49%).

Aurora County, SD population by age cohort

To better understand the age distribution of Aurora 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

Aurora County, SD population by age cohort

The largest age group was 18 to 64 years with a population of 1,404 (54.57% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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Aurora 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 630 24.49%
18 to 64 years 1,404 54.57%
65 years and over 539 20.95%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Aurora County 's population under 18 was 24.49%, compared to the 22.16% nationwide.
  • Aurora County's working population (between 18 and 64) was 54.57%, compared to 61% nationwide.
  • Aurora County's elderly or the senior population (over 65 age) was 20.95% as compared to 16.84% nationwide.

Aurora County, SD population pyramid

Population pyramid for Aurora 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 Aurora County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Aurora County, SD, is 32.2.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Aurora County, SD, is 35.0.
  • Total dependency ratio for Aurora County, SD is 67.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Aurora County, SD is 2.9.

FIGURE 3

Aurora County, SD population pyramid

Aurora 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) 2019-2023 5-Year Estimates.
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Aurora County, SD population pyramid

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

Age Group Population(Male) Population(Female) Total Population
Under 5 years 79 85 164
5 to 9 years 86 57 143
10 to 14 years 91 97 188
15 to 19 years 106 78 184
20 to 24 years 96 79 175
25 to 29 years 75 55 130
30 to 34 years 85 40 125
35 to 39 years 46 60 106
40 to 44 years 106 81 187
45 to 49 years 66 88 154
50 to 54 years 48 52 100
55 to 59 years 105 87 192
60 to 64 years 104 82 186
65 to 69 years 88 121 209
70 to 74 years 44 46 90
75 to 79 years 47 44 91
80 to 84 years 34 30 64
85 years and over 34 51 85
Exploring Aurora County's Diversity? Request Customized Data Now!

Things to know

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

Aurora County's population under the age of 18 is 630, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 24.49% of the total resident population of Aurora County, SD.

What is the aging population in Aurora County, SD?

Aurora County's population aged 65 years and above was 539. As per the U.S. Census Bureau's American Community Survey, this population is 20.95% of the entire population.

References

Datasets

Explore datasets by year of publication.
2025
Aurora County, SD Age Group Population Dataset: A Complete Breakdown of Aurora County Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the Aurora 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 Aurora County. The dataset can be utilized to understand the population distribution of Aurora County by age. For example, using this dataset, we can identify the largest age group in Aurora County.

Key observations

The largest age group in Aurora County, SD was for the group of age 65 to 69 years years with a population of 209 (8.12%), according to the ACS 2019-2023 5-Year Estimates. At the same time, the smallest age group in Aurora County, SD was the 80 to 84 years years with a population of 64 (2.49%). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Aurora County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Aurora 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 Aurora County Population by Age. You can refer the same here

Aurora County, SD Age Cohorts Dataset: Children, Working Adults, and Seniors in Aurora County - Population and Percentage Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the Aurora 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 Aurora 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 1,404 (54.57% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Aurora County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Aurora County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Aurora 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 Aurora County Population by Age. You can refer the same here

Aurora County, SD Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Aurora County, SD population pyramid, which represents the Aurora County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Aurora County, SD, is 32.2.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Aurora County, SD, is 35.0.
  • Total dependency ratio for Aurora County, SD is 67.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Aurora County, SD is 2.9.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Aurora County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Aurora County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Aurora County for the selected age group is shown in the following column.
  • Total Population: The total population of the Aurora 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 Aurora 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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Aurora County, SD Demographics Aurora County, SD Population

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Collection 5 Resources