Ada County, ID population by gender
The table below shows Ada County's population by gender
Gender | Population | % of Total Population |
---|---|---|
Male | 244,102 | 50.30% |
Female | 241,144 | 49.70% |
TABLE OF CONTENTS
Ada County, ID population by gender, in percentage
The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.70% females and 50.30% males in Ada County, ID.
The above comparison shows there are more females than males in the Ada County county as compared to the nation.

Ada County, ID gender ratio
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
In Ada County, ID, there are more men than women. The Ada County, ID gender ratio is 101.2:100 i.e. 101.2 men to 100 women (1.012).
This ratio is higher than the national average of 98:100 i.e 98 men to 100 women (0.980).
Ada County, ID gender ratio by age
In Ada County, ID, the sex ratio for children under 18 years is 104.5 boys per 100 girls (104.5:100).Having said that, for seniors aged 80 and older, there are 70.5 males per 100 females (70.5:100).
On the national level, the sex ratio (male per 100 females) for under 18 age group is 104.8:100, and 64.5:100 for the senior population 80 years and older.
The table below lists the male and female population in each age group along with the gender ratio for Ada County, ID.
Age Group | Population (Male) | Population (Female) | Gender Ratio |
---|---|---|---|
Under 5 years | 13,637 | 13,068 | 1.04 |
5 to 9 years | 14,840 | 14,190 | 1.05 |
10 to 14 years | 18,853 | 18,027 | 1.05 |
15 to 19 years | 17,120 | 16,135 | 1.06 |
20 to 24 years | 14,919 | 13,828 | 1.08 |
25 to 29 years | 17,427 | 16,198 | 1.08 |
30 to 34 years | 17,487 | 17,161 | 1.02 |
35 to 39 years | 18,813 | 18,590 | 1.01 |
40 to 44 years | 16,934 | 15,575 | 1.09 |
45 to 49 years | 16,744 | 15,403 | 1.09 |
50 to 54 years | 15,482 | 14,776 | 1.05 |
55 to 59 years | 15,881 | 15,765 | 1.01 |
60 to 64 years | 13,042 | 14,176 | 0.92 |
65 to 69 years | 12,180 | 13,298 | 0.92 |
70 to 74 years | 9,288 | 10,089 | 0.92 |
75 to 79 years | 5,605 | 6,572 | 0.85 |
80 to 84 years | 3,473 | 4,021 | 0.86 |
85 years and over | 2,377 | 4,272 | 0.56 |
Interesting observation from the above table:
- The sex ratio at birth is 1.044 i.e. 104.4 boys per 100 girls.
- For the 60-64 years, the sex ratio is 0.920 i.e. 8.0 less men per 100 women.
- While for senior most population of 85+ age group, the sex ratio is 0.556 i.e. 55.6 senior men per 100 senior women.
Ada County, ID population by gender & age
For male population, the largest age group is 10-14 years with a population of 18,853. Whereas, for the female population, the largest age group is 35-39 years with a population of 18,590.
As you can note from the above numbers, the largest age group for men and women are different.

Under the age of 5, there are 13,637 boys and 13,068 girls in Ada County, ID. Thus there are 569 more boys than girls under the age of 5.
Between the age group of 60-64 years, there are 13,042 males and 14,176 females in Ada County, ID. Thus there are 1,134 less males than females between the age of 60 and 64 years.
For the senior most age group of 85+ years, there are 2,377 males and 4,272 females.
Things to know
What percent of Ada County, ID is female?
According to the ACS survey, of the total Ada County, ID population of 485,246, 49.70% percent are females.
What percentage of Ada County, ID is male?
According to the ACS survey, of the total Ada County, ID population of 485,246, 50.30% percent are males.
What is the male to female ratio in Ada County, ID?
In Ada County, ID, the male to female ratio is 101.2:100 i.e. 101.2 men to 100 women (1.012).
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates