O Brien County, IA population by gender
The table below shows O Brien County's population by gender
| Gender | Population | % of Total Population |
|---|---|---|
| Female | 7,068 | 50.12% |
| Male | 7,035 | 49.88% |
TABLE OF CONTENTS
O Brien County, IA population by gender, in percentage
The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.12% females and 49.88% 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 50.12% 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 99.5:100 i.e. 99.5 men to 100 women (0.995).
This ratio is higher than the national average of 98:100 i.e 98 men to 100 women (0.980).
O Brien County, IA gender ratio by age
In O Brien County, IA, the sex ratio for children under 18 years is 103.1 boys per 100 girls (103.1:100).Having said that, for seniors aged 80 and older, there are 49.6 males per 100 females (49.6:100).
On the national level, the sex ratio (male per 100 females) for under 18 age group is 104.8:100, and 65.6:100 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 | 490 | 442 | 1.11 |
| 5 to 9 years | 559 | 506 | 1.10 |
| 10 to 14 years | 433 | 479 | 0.90 |
| 15 to 19 years | 418 | 392 | 1.07 |
| 20 to 24 years | 423 | 313 | 1.35 |
| 25 to 29 years | 440 | 439 | 1.00 |
| 30 to 34 years | 401 | 410 | 0.98 |
| 35 to 39 years | 500 | 458 | 1.09 |
| 40 to 44 years | 402 | 402 | 1.00 |
| 45 to 49 years | 327 | 335 | 0.98 |
| 50 to 54 years | 419 | 332 | 1.26 |
| 55 to 59 years | 404 | 334 | 1.21 |
| 60 to 64 years | 491 | 581 | 0.85 |
| 65 to 69 years | 517 | 392 | 1.32 |
| 70 to 74 years | 270 | 390 | 0.69 |
| 75 to 79 years | 209 | 194 | 1.08 |
| 80 to 84 years | 106 | 252 | 0.42 |
| 85 years and over | 226 | 417 | 0.54 |
Interesting observation from the above table:
- The sex ratio at birth is 1.109 i.e. 110.9 boys per 100 girls.
- For the 60-64 years, the sex ratio is 0.845 i.e. 15.5 less men per 100 women.
- While for senior most population of 85+ age group, the sex ratio is 0.542 i.e. 54.2 senior men per 100 senior women.
O Brien County, IA population by gender & age
For male population, the largest age group is 5-9 years with a population of 559. Whereas, for the female population, the largest age group is 60-64 years with a population of 581.
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 # 5-9 years (559) | Female # 60-64 years (581).
Under the age of 5, there are 490 boys and 442 girls in O Brien County, IA. Thus there are 48 more boys than girls under the age of 5.
Between the age group of 60-64 years, there are 491 males and 581 females in O Brien County, IA. Thus there are 90 less males than females between the age of 60 and 64 years.
For the senior most age group of 85+ years, there are 226 males and 417 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 14,103, 50.12% 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 14,103, 49.88% 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 99.5:100 i.e. 99.5 men to 100 women (0.995).
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates