Alameda County, CA population age distributions
A complete breakdown of Alameda 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 | 89,987 | 5.41% |
| 5 to 9 years | 92,408 | 5.55% |
| 10 to 14 years | 94,607 | 5.69% |
| 15 to 19 years | 96,579 | 5.8% |
| 20 to 24 years | 96,354 | 5.79% |
| 25 to 29 years | 123,782 | 7.44% |
| 30 to 34 years | 142,980 | 8.59% |
| 35 to 39 years | 136,750 | 8.22% |
| 40 to 44 years | 121,851 | 7.32% |
| 45 to 49 years | 113,572 | 6.83% |
| 50 to 54 years | 108,610 | 6.53% |
| 55 to 59 years | 106,049 | 6.37% |
| 60 to 64 years | 97,055 | 5.83% |
| 65 to 69 years | 77,811 | 4.68% |
| 70 to 74 years | 65,475 | 3.94% |
| 75 to 79 years | 41,482 | 2.49% |
| 80 to 84 years | 27,596 | 1.66% |
| 85 years and over | 30,875 | 1.86% |
TABLE OF CONTENTS
Alameda County, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Alameda County, CA population by age group.
The largest age group is 30 to 34 years with a population of 142,980 (8.59% of the total population).
The largest age group in Alameda County, CA was for the group of age 30 to 34 years with a population of 142,980 (8.59%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Alameda County, CA was the 80 to 84 years with a population of 27,596 (1.66%).
Alameda County, CA population by age cohort
To better understand the age distribution of Alameda County, CA'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
Alameda County, CA population by age cohort
The largest age group was 18 to 64 years with a population of 1.09 million (65.38% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Alameda County 's population under 18 was 20%, compared to the 22.11% nationwide.
- Alameda County's working population (between 18 and 64) was 65.38%, compared to 61.36% nationwide.
- Alameda County's elderly or the senior population (over 65 age) was 14.62% as compared to 16.53% nationwide.
Alameda County, CA population pyramid
Population pyramid for Alameda County, CA 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 Alameda County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Alameda County, CA, is 24.2.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Alameda County, CA, is 21.3.
- Total dependency ratio for Alameda County, CA is 45.5.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Alameda County, CA is 4.7.
FIGURE 3
Alameda County, CA population pyramid
Alameda County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Alameda County, CA population pyramid
Here's the Alameda County, CA's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 45,925 | 44,062 | 89,987 |
| 5 to 9 years | 47,576 | 44,832 | 92,408 |
| 10 to 14 years | 48,382 | 46,225 | 94,607 |
| 15 to 19 years | 48,874 | 47,705 | 96,579 |
| 20 to 24 years | 48,280 | 48,074 | 96,354 |
| 25 to 29 years | 62,380 | 61,402 | 123,782 |
| 30 to 34 years | 72,338 | 70,642 | 142,980 |
| 35 to 39 years | 69,473 | 67,277 | 136,750 |
| 40 to 44 years | 62,112 | 59,739 | 121,851 |
| 45 to 49 years | 57,592 | 55,980 | 113,572 |
| 50 to 54 years | 55,360 | 53,250 | 108,610 |
| 55 to 59 years | 52,792 | 53,257 | 106,049 |
| 60 to 64 years | 48,061 | 48,994 | 97,055 |
| 65 to 69 years | 36,655 | 41,156 | 77,811 |
| 70 to 74 years | 30,165 | 35,310 | 65,475 |
| 75 to 79 years | 17,775 | 23,707 | 41,482 |
| 80 to 84 years | 12,014 | 15,582 | 27,596 |
| 85 years and over | 10,807 | 20,068 | 30,875 |
Things to know
What is the population of Alameda County, CA under 18?
Alameda County's population under the age of 18 is 332,827, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 20% of the total resident population of Alameda County, CA.
What is the aging population in Alameda County, CA?
Alameda County's population aged 65 years and above was 243,239. As per the U.S. Census Bureau's American Community Survey, this population is 14.62% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates