O Brien County, IA population by gender
The table below shows O Brien County's population by gender
| Gender | Population | % of Total Population |
|---|---|---|
| Female | 7,131 | 50.44% |
| Male | 7,007 | 49.56% |
TABLE OF CONTENTS
O Brien County, IA population by gender, in percentage
The female percentage in the USA is 50.41% while the male percentage is 49.59%, compared to 50.44% females and 49.56% males in O Brien County, IA.
The above comparison shows there are more females than males in the O Brien County county as compared to the nation.
FIGURE 1
O Brien County, IA population by gender.
There is a slight majority of female population, with 50.44% of total population being female.
O Brien County, IA gender ratio
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
In O Brien County, IA, there are less men than women. The O Brien County, IA gender ratio is 98.3:100 i.e. 98.3 men to 100 women (0.983).
This ratio is lower than the national average of 98.4:100 i.e 98.4 men to 100 women (0.984).
O Brien County, IA gender ratio by age
In O Brien County, IA, the sex ratio for children under 18 years is 95.6 boys per 100 girls (95.6:100).Having said that, for seniors aged 80 and older, there are 50.9 males per 100 females (50.9:100).
On the national level, the sex ratio (male per 100 females) for under 18 age group is 104.9:100, and 63.4:100 for the senior population 80 years and older.
O Brien County, IA gender ratio by age
The table below lists the male and female population in each age group along with the gender ratio for O Brien County, IA.
| Age Group | Population (Male) | Population (Female) | Gender Ratio |
|---|---|---|---|
| Under 5 years | 426 | 466 | 0.91 |
| 5 to 9 years | 486 | 545 | 0.89 |
| 10 to 14 years | 458 | 438 | 1.05 |
| 15 to 19 years | 441 | 404 | 1.09 |
| 20 to 24 years | 415 | 325 | 1.28 |
| 25 to 29 years | 444 | 441 | 1.01 |
| 30 to 34 years | 417 | 383 | 1.09 |
| 35 to 39 years | 485 | 431 | 1.13 |
| 40 to 44 years | 371 | 378 | 0.98 |
| 45 to 49 years | 349 | 333 | 1.05 |
| 50 to 54 years | 429 | 340 | 1.26 |
| 55 to 59 years | 432 | 408 | 1.06 |
| 60 to 64 years | 530 | 526 | 1.01 |
| 65 to 69 years | 487 | 400 | 1.22 |
| 70 to 74 years | 276 | 359 | 0.77 |
| 75 to 79 years | 176 | 197 | 0.89 |
| 80 to 84 years | 143 | 254 | 0.56 |
| 85 years and over | 242 | 503 | 0.48 |
Interesting observation from the above table:
- The sex ratio at birth is 0.914 i.e. 91.4 boys per 100 girls.
- For the 60-64 years, the sex ratio is 1.008 i.e. 0.8 more men per 100 women.
- While for senior most population of 85+ age group, the sex ratio is 0.481 i.e. 48.1 senior men per 100 senior women.
O Brien County, IA population by gender & age
For male population, the largest age group is 60-64 years with a population of 530. Whereas, for the female population, the largest age group is 5-9 years with a population of 545.
As you can note from the above numbers, the largest age group for men and women are different.
FIGURE 2
O Brien County, IA population by gender and age.
Largest age group (population): Male # 60-64 years (530) | Female # 5-9 years (545).
Under the age of 5, there are 426 boys and 466 girls in O Brien County, IA. Thus there are 40 less boys than girls under the age of 5.
Between the age group of 60-64 years, there are 530 males and 526 females in O Brien County, IA. Thus there are 4 more males than females between the age of 60 and 64 years.
For the senior most age group of 85+ years, there are 242 males and 503 females.
Things to know
What percent of O Brien County, IA is female?
According to the ACS survey, of the total O Brien County, IA population of 14,138, 50.44% percent are females.
What percentage of O Brien County, IA is male?
According to the ACS survey, of the total O Brien County, IA population of 14,138, 49.56% percent are males.
What is the male to female ratio in O Brien County, IA?
In O Brien County, IA, the male to female ratio is 98.3:100 i.e. 98.3 men to 100 women (0.983).
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates