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Brazoria County, TX Population by Age

The median age in Brazoria County, TX is 36.1, as per 2021 ACS 5-Year Estimates. Of the total population, 21.79% were under the age of 15, 19.23% aged 15 to 29, 47.13% aged 30 to 64, 10.57% aged 65 to 84, and 1.28% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Brazoria County, TX population age distribution

A complete breakdown of Brazoria 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 24,546 6.66%
5 to 9 years 27,738 7.53%
10 to 14 years 28,044 7.61%
15 to 19 years 25,887 7.02%
20 to 24 years 21,783 5.91%
25 to 29 years 23,221 6.3%
30 to 34 years 26,825 7.28%
35 to 39 years 29,319 7.95%
40 to 44 years 26,059 7.07%
45 to 49 years 25,486 6.91%
50 to 54 years 23,287 6.32%
55 to 59 years 24,340 6.6%
60 to 64 years 18,388 4.99%
65 to 69 years 16,016 4.35%
70 to 74 years 11,653 3.16%
75 to 79 years 6,993 1.9%
80 to 84 years 4,278 1.16%
85 years and over 4,712 1.28%
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TABLE OF CONTENTS

Brazoria County, TX population by age group

Key stats
127,998
Population under 25 years
105,424
Population aged 25-44
91,501
Population aged 45-64
43,652
Population aged 65+

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

The graph shows Brazoria County's population by age group, with age group on x-axis and the respective age group's percent of the total population on y-axis
Brazoria County, TX population by age group. The largest age group was 35-39 years with a poulation of 29,319 (7.95% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Brazoria County, TX was for the group of age 35-39 years with a population of 29,319 (7.95%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Brazoria County, TX was the 80-84 years with a population of 4,278 (1.16%).

Brazoria County, TX population by age cohort

To better understand the age distribution of Brazoria County, TX'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
The pie chart shows Brazoria County's population divided into segments, with each segment representing an age cohort. The area of each segment is in the same proportion of a circle as the population of the cohort is of the total population.
Brazoria County, TX population by age cohorts (Children: Under 18 years; Working population: 18-64 years; Senior population: 65 years or more). The largest age group was 18 - 64 years with a poulation of 227,732 (61.79% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Age Group Population % of Total Population
Under 18 years 97,191 26.37%
18 to 64 years 227,732 61.79%
85 years and over 43,652 11.84%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Brazoria County's population under 18 was 26.37%, compared to the 22.51% nationwide.
  • Brazoria County's working population (between 18 and 64) was 61.79%, compared to 61.45% nationwide.
  • Brazoria County's elderly or the senior population (over 65 age) was 11.84% as compared to 16.04% nationwide.

Brazoria County, TX population pyramid

Population pyramid for Brazoria County, TX 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 Brazoria County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Brazoria County, TX, is 32.8.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Brazoria County, TX, is 17.8.
  • Total dependency ratio for Brazoria County, TX is 50.7.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Brazoria County, TX is 5.6.
The graph shows Brazoria County's population across different age group and gender, with population on x-axis and population y-axis. The male population is plotted on the left in blue color whereas the female population is plotted on the right in pink color.
Brazoria County, TX population pyramid i.e. Brazoria County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Brazoria County, TX's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 12,631 11,915 24,546
5 to 9 years 14,978 12,760 27,738
10 to 14 years 13,602 14,442 28,044
15 to 19 years 13,317 12,570 25,887
20 to 24 years 11,075 10,708 21,783
25 to 29 years 12,224 10,997 23,221
30 to 34 years 13,600 13,225 26,825
35 to 39 years 14,447 14,872 29,319
40 to 44 years 13,999 12,060 26,059
45 to 49 years 13,177 12,309 25,486
50 to 54 years 12,145 11,142 23,287
55 to 59 years 12,217 12,123 24,340
60 to 64 years 9,255 9,133 18,388
65 to 69 years 7,919 8,097 16,016
70 to 74 years 5,511 6,142 11,653
75 to 79 years 3,375 3,618 6,993
80 to 84 years 2,197 2,081 4,278
85 years and over 1,261 3,451 4,712
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Things to know

What is the population of Brazoria County, TX under 18?

Brazoria County's population under the age of 18 is 97,191, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 26.37% of the total resident population of Brazoria County, TX.

What is the aging population in Brazoria County, TX?

Brazoria County's population aged 65 years and above was 43,652. As per the U.S. Census Bureau's American Community Survey, this population is 11.84% of the entire population.

References

Datasets

Brazoria County, TX Age Group Population Dataset: A complete breakdown of Brazoria County age demographics from 0 to 85 years, distributed across 18 age groups
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

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

Key observations

The largest age group in Brazoria County, TX was for the group of age 35-39 years with a population of 29,319 (7.95%), according to the 2021 American Community Survey. At the same time, the smallest age group in Brazoria County, TX was the 80-84 years with a population of 4,278 (1.16%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Brazoria County population by age group

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 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 Brazoria County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Brazoria 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 Brazoria County Population by Age. You can refer the same here

Brazoria County, TX Age Cohorts Dataset: Children, Working Adults, and Seniors in Brazoria County - Population and Percentage Analysis
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the Brazoria 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 Brazoria 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 $b3_v1 with a poulation of $b3_v2 ($b3_v3 of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Brazoria County population by age cohort

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 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 Brazoria County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Brazoria County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Brazoria 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 Brazoria County Population by Age. You can refer the same here

Brazoria County, TX Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Brazoria County, TX population pyramid, which represents the Brazoria County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey 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 Brazoria County, TX, is 32.8.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Brazoria County, TX, is 17.8.
  • Total dependency ratio for Brazoria County, TX is 50.7.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Brazoria County, TX is 5.6.

Brazoria County population pyramid

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 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 Brazoria County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Brazoria County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Brazoria County for the selected age group is shown in the following column.
  • Total Population: The total population of the Brazoria 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 Brazoria County Population by Age. You can refer the same here

Explore related topics

Brazoria County, TX Demographics Brazoria County, TX Population

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About the author

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Neilsberg Research
Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.
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Collection 5 Resources