Hidalgo County, TX population age distribution
A complete breakdown of Hidalgo 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 | 74,233 | 8.58% |
5 to 9 years | 76,252 | 8.81% |
10 to 14 years | 83,217 | 9.61% |
15 to 19 years | 76,627 | 8.85% |
20 to 24 years | 65,759 | 7.6% |
25 to 29 years | 61,454 | 7.1% |
30 to 34 years | 54,442 | 6.29% |
35 to 39 years | 53,673 | 6.2% |
40 to 44 years | 55,403 | 6.4% |
45 to 49 years | 51,674 | 5.97% |
50 to 54 years | 44,735 | 5.17% |
55 to 59 years | 37,375 | 4.32% |
60 to 64 years | 35,734 | 4.13% |
65 to 69 years | 29,405 | 3.4% |
70 to 74 years | 24,800 | 2.86% |
75 to 79 years | 18,280 | 2.11% |
80 to 84 years | 12,608 | 1.46% |
85 years and over | 10,006 | 1.16% |
TABLE OF CONTENTS
Hidalgo County, TX population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Hidalgo County, TX was for the group of age 10-14 years with a population of 83,217 (9.61%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Hidalgo County, TX was the 85+ years with a population of 10,006 (1.16%).
Hidalgo County, TX population by age cohort
To better understand the age distribution of Hidalgo 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

Here's the population for each of the three cohorts.
Age Group | Population | % of Total Population |
---|---|---|
Under 18 years | 281,366 | 32.5% |
18 to 64 years | 489,212 | 56.51% |
85 years and over | 95,099 | 10.99% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Hidalgo County's population under 18 was 32.50%, compared to the 22.51% nationwide.
- Hidalgo County's working population (between 18 and 64) was 56.51%, compared to 61.45% nationwide.
- Hidalgo County's elderly or the senior population (over 65 age) was 10.99% as compared to 16.04% nationwide.
Hidalgo County, TX population pyramid
Population pyramid for Hidalgo 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 Hidalgo County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Hidalgo County, TX, is 43.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Hidalgo County, TX, is 17.7.
- Total dependency ratio for Hidalgo County, TX is 61.2.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Hidalgo County, TX is 5.6.

Here's the Hidalgo County, TX's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 37,819 | 36,414 | 74,233 |
5 to 9 years | 38,650 | 37,602 | 76,252 |
10 to 14 years | 42,812 | 40,405 | 83,217 |
15 to 19 years | 38,738 | 37,889 | 76,627 |
20 to 24 years | 32,990 | 32,769 | 65,759 |
25 to 29 years | 31,009 | 30,445 | 61,454 |
30 to 34 years | 27,358 | 27,084 | 54,442 |
35 to 39 years | 26,639 | 27,034 | 53,673 |
40 to 44 years | 27,185 | 28,218 | 55,403 |
45 to 49 years | 24,881 | 26,793 | 51,674 |
50 to 54 years | 21,379 | 23,356 | 44,735 |
55 to 59 years | 17,775 | 19,600 | 37,375 |
60 to 64 years | 16,644 | 19,090 | 35,734 |
65 to 69 years | 14,087 | 15,318 | 29,405 |
70 to 74 years | 10,744 | 14,056 | 24,800 |
75 to 79 years | 8,036 | 10,244 | 18,280 |
80 to 84 years | 5,487 | 7,121 | 12,608 |
85 years and over | 3,969 | 6,037 | 10,006 |
Things to know
What is the population of Hidalgo County, TX under 18?
Hidalgo County's population under the age of 18 is 281,366, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 32.50% of the total resident population of Hidalgo County, TX.
What is the aging population in Hidalgo County, TX?
Hidalgo County's population aged 65 years and above was 95,099. As per the U.S. Census Bureau's American Community Survey, this population is 10.99% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates