Black Hawk County, IA population by gender
The table below shows Black Hawk County's population by gender
Gender | Population | % of Total Population |
---|---|---|
Male | 64,875 | 49.37% |
Female | 66,521 | 50.63% |
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Black Hawk 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 50.63% females and 49.37% males in Black Hawk County, IA.
The above comparison shows there are more females than males in the Black Hawk County county as compared to the nation.

Black Hawk County, IA gender ratio
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
In Black Hawk County, IA, there are less men than women. The Black Hawk County, IA gender ratio is 97.5:100 i.e. 97.5 men to 100 women (0.975).
This ratio is lower than the national average of 98:100 i.e 98 men to 100 women (0.980).
Black Hawk County, IA gender ratio by age
In Black Hawk County, IA, the sex ratio for children under 18 years is 103.6 boys per 100 girls (103.6:100).Having said that, for seniors aged 80 and older, there are 58.6 males per 100 females (58.6:100).
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 Black Hawk County, IA.
Age Group | Population (Male) | Population (Female) | Gender Ratio |
---|---|---|---|
Under 5 years | 4,126 | 4,046 | 1.02 |
5 to 9 years | 4,243 | 3,691 | 1.15 |
10 to 14 years | 3,982 | 4,112 | 0.97 |
15 to 19 years | 4,387 | 4,793 | 0.92 |
20 to 24 years | 7,089 | 7,268 | 0.98 |
25 to 29 years | 4,764 | 4,441 | 1.07 |
30 to 34 years | 3,947 | 3,752 | 1.05 |
35 to 39 years | 4,288 | 4,284 | 1.00 |
40 to 44 years | 3,556 | 3,262 | 1.09 |
45 to 49 years | 3,535 | 3,396 | 1.04 |
50 to 54 years | 3,460 | 3,399 | 1.02 |
55 to 59 years | 3,740 | 3,739 | 1.00 |
60 to 64 years | 3,944 | 4,442 | 0.89 |
65 to 69 years | 3,556 | 3,484 | 1.02 |
70 to 74 years | 2,602 | 3,169 | 0.82 |
75 to 79 years | 1,798 | 2,072 | 0.87 |
80 to 84 years | 992 | 1,449 | 0.68 |
85 years and over | 866 | 1,722 | 0.50 |
Interesting observation from the above table:
- The sex ratio at birth is 1.020 i.e. 102 boys per 100 girls.
- For the 60-64 years, the sex ratio is 0.888 i.e. 11.2 less men per 100 women.
- While for senior most population of 85+ age group, the sex ratio is 0.503 i.e. 50.3 senior men per 100 senior women.
Black Hawk County, IA population by gender & age
For male population, the largest age group is 20-24 years with a population of 7,089. Whereas, for the female population, the largest age group is 20-24 years with a population of 7,268.
As you can note from the above numbers, the largest age group for men and women are same. The above comparison also shows that there are 179 more females than males, in the age group 20-24 years (The largest age group for both of the genders).

Under the age of 5, there are 4,126 boys and 4,046 girls in Black Hawk County, IA. Thus there are 80 more boys than girls under the age of 5.
Between the age group of 60-64 years, there are 3,944 males and 4,442 females in Black Hawk County, IA. Thus there are 498 less males than females between the age of 60 and 64 years.
For the senior most age group of 85+ years, there are 866 males and 1,722 females.
Things to know
What percent of Black Hawk County, IA is female?
According to the ACS survey, of the total Black Hawk County, IA population of 131,396, 50.63% percent are females.
What percentage of Black Hawk County, IA is male?
According to the ACS survey, of the total Black Hawk County, IA population of 131,396, 49.37% percent are males.
What is the male to female ratio in Black Hawk County, IA?
In Black Hawk County, IA, the male to female ratio is 97.5:100 i.e. 97.5 men to 100 women (0.975).
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates