Demographics of Black Hawk County, Iowa

Black Hawk County, Iowa had 131,532 people on July 1, 2025, by the Census Bureau’s estimate: +495 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Black Hawk County, in four figures

131,532
Population: July 1, 2025, Vintage 2025 estimate.; +0.4%
Change since July 2020: +495 people.; 35.7 ±0.2
Median age: ACS 2020–⁠2024.; $66,417 ±$1,805
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Black Hawk County, Iowa's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Black Hawk County, Iowa's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Black Hawk County, Iowa's population grew 0.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Black Hawk County, Iowa's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	131,037	100.0	100.0
2021	130,571	99.6	100.2
2022	129,963	99.2	100.7
2023	130,812	99.8	101.6
2024	131,473	100.3	102.5
2025	131,532	100.4	103.1

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Population of Black Hawk County, Iowa on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	131,037	−109	+63	+7	−199
2021	130,571	−466	+82	+208	−830
2022	129,963	−608	+114	+430	−1,115
2023	130,812	+849	+174	+714	−9
2024	131,473	+661	+174	+649	−144
2025	131,532	+59	+195	+390	−526

Age, 2020–2024

The median age is 35.7 ±0.2: for men 35.2 ±0.2 and for women 36.3 ±0.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Black Hawk County by age, ACS 2020–2024
Age	People	Share	Iowa	United States
Under 5	8,000 ±93	6.1% ±0.1	5.9% ±<0.1	5.6% ±<0.1
5 to 17	20,744 ±660	15.8% ±0.5	17.0% ±0.1	16.3% ±<0.1
18 to 24	19,017 ±1,081	14.5% ±0.8	10.0% ±0.1	9.1% ±<0.1
25 to 44	32,361 ±590	24.7% ±0.5	25.1% ±0.1	26.9% ±<0.1
45 to 64	27,789 ±707	21.2% ±0.5	23.9% ±0.1	24.8% ±<0.1
65 and over	23,138 ±768	17.7% ±0.6	18.1% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $66,417 ±$1,805, and income per person $37,541 ±$1,149, in 2024 dollars. The median is $75,059 ±$418 in Iowa and $80,734 ±$166 in the United States.

Households by income

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Households in Black Hawk County by income, ACS 2020–2024
Household income	Households	Share	Iowa	United States
Under $25,000	8,428 ±700	15.4% ±1.3	13.9% ±0.2	14.6% ±<0.1
$25,000 to $49,999	11,657 ±796	21.4% ±1.4	18.5% ±0.3	16.7% ±<0.1
$50,000 to $74,999	10,539 ±795	19.3% ±1.4	17.5% ±0.3	15.5% ±<0.1
$75,000 to $99,999	7,141 ±538	13.1% ±1.0	14.0% ±0.3	12.6% ±<0.1
$100,000 to $149,999	9,117 ±641	16.7% ±1.2	18.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	3,974 ±459	7.3% ±0.8	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	3,707 ±468	6.8% ±0.9	8.6% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Black Hawk County by age, ACS 2020–2024
Age	Below poverty	Rate	Iowa	United States
All ages	18,843 ±1,506	14.9% ±1.2	11.1% ±0.2	12.5% ±0.1
Under 18	4,884 ±612	17.2% ±2.1	12.9% ±0.3	16.1% ±0.1
18 to 59	11,341 ±956	16.7% ±1.4	11.4% ±0.3	11.6% ±0.1
60 and over	2,618 ±343	8.7% ±1.1	8.8% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Black Hawk County, ACS 2020–2024
Measure	Black Hawk County	Iowa	United States
Housing units	58,991 ±109	1,437,699 ±523	143,775,355 ±10,234
Occupied	92.5% ±0.9	91.5% ±0.3	89.9% ±0.1
Vacant	7.5% ±0.9	8.5% ±0.3	10.1% ±0.1
Owner occupied	66.2% ±1.1	71.7% ±0.3	65.2% ±0.3
Renter occupied	33.8% ±1.4	28.3% ±0.3	34.8% ±0.1
Median home value	$188,900 ±$4,988	$208,000 ±$1,141	$332,700 ±$236
Median gross rent	$989 ±$20	$972 ±$6	$1,413 ±$2
Median year built	1966 ±2	1972 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Black Hawk County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Iowa	United States
Hispanic or Latino	6,861 ±0	5.2% ±<0.1	7.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	102,297 ±341	78.1% ±0.3	82.3% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	11,985 ±584	9.1% ±0.4	3.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	3,516 ±247	2.7% ±0.2	2.5% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	40 to 138	< 0.1% to 0.1%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	964 ±33	0.7% ±<0.1	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	97 to 429	0.1% to 0.3%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	5,074 ±774	3.9% ±0.6	3.5% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Black Hawk County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Iowa	United States
Born in the state	96,568 ±1,424	73.7% ±1.1	69.6% ±0.2	57.3% ±<0.1
Born in another state	24,448 ±1,191	18.7% ±0.9	23.8% ±0.2	26.9% ±<0.1
Born a citizen outside the states	1,552 ±452	1.2% ±0.3	0.7% ±<0.1	1.7% ±<0.1
Born abroad	8,481 ±769	6.5% ±0.6	5.9% ±0.1	14.1% ±<0.1
Naturalized citizens	3,818 ±535	2.9% ±0.4	2.6% ±0.1	7.4% ±<0.1
Not citizens	4,663 ±607	3.6% ±0.5	3.3% ±0.1	6.8% ±<0.1

Black Hawk County among the counties of Iowa

5th of 99 by population, July 2025. Every one is listed on the Iowa page.

Counties of Iowa near Black Hawk County in population, July 2025
County	July 2025	Change since 2020
Polk County	516,546	+4.8%
Linn County	232,028	+0.7%
Scott County	175,259	+0.4%
Johnson County	160,044	+4.6%
Black Hawk County	131,532	+0.4%
Dallas County	118,457	+17.8%
Woodbury County	106,649	+0.7%
Story County	101,291	+2.7%
Dubuque County	99,381	+0.1%
Pottawattamie County	92,996	−0.7%

Elsewhere on the site

Rankings this appears in

No. 5 Counties by population in Iowa
No. 30 Counties by population growth in Iowa

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026