Black Hawk County, Iowa

2024 results by precinct

59 precincts · 62,906 votes cast

Harris · D+1

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+1.2%	31,299	30,572	62,906
2020	D	+9.0%	35,647	29,640	66,593
2016	D	+7.3%	32,233	27,476	65,007
2012	D	+20.2%	39,821	26,235	67,141
2008	D	+22.4%	39,184	24,662	64,775
2004	D	+11.5%	35,392	28,046	63,907
2000	D	+12.1%	30,112	23,468	55,085
1996	D	+19.4%	29,651	19,322	53,109
1992	D	+13.3%	29,584	21,398	61,550
1988	D	+13.4%	31,657	24,112	56,171
1984	R	−1.2%	31,467	32,262	64,233
1980	R	−3.4%	27,443	29,627	63,722
1976	R	−2.4%	29,508	30,994	61,715
1972	R	−17.1%	21,721	30,929	53,782
1968	R	−9.1%	21,097	25,594	49,554
1964	D	+21.7%	30,716	19,744	50,516
1960	R	−8.3%	24,078	28,435	52,551
1956	R	−16.1%	20,403	28,250	48,719
1952	R	−24.5%	17,360	28,671	46,234
1948	D	+9.8%	19,603	16,041	36,230
1944	D	+2.8%	16,593	15,687	32,434
1940	D	+0.5%	17,305	17,132	34,532
1936	D	+9.9%	16,793	13,666	31,681
1932	R	−0.3%	14,660	14,746	29,765
1928	R	−39.1%	8,467	19,409	27,989
1924	R	−53.0%	2,981	15,813	24,221
1920	R	−58.5%	4,000	16,920	22,101
1916	R	−21.8%	4,270	6,742	11,361
1912	D	+19.7%	3,702	1,601	10,649
1908	R	−25.4%	3,127	5,437	9,112
1904	R	−43.1%	1,861	5,236	7,827
1900	R	−32.1%	2,512	5,010	7,781
1896	R	−35.2%	2,167	4,643	7,030
1892	R	−15.4%	2,544	3,483	6,102
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

American

100.0%

Polish

0.5%

African American

7.4%

Multiple ancestry combinations reported; no single grouping above 1%.

American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.

Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 35.7 in this county, 39.1 nationally

Male

Age

Female

0.6%

85+

1.4%

2.4%

75–84

2.8%

4.9%

65–74

5.5%

5.4%

55–64

5.7%

5.1%

45–54

4.9%

6.1%

35–44

5.9%

6.4%

25–34

6.2%

7.0%

18–24

7.5%

8.1%

5–17

7.8%

3.0%

3.1%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$66,417

Black Hawk County ranks near the middle of US counties.

Black Hawk County$66,417

Iowa$75,059

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

14.9%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

14.9%

Mainline Protestant

13.5%

Baptist

7.0%

Other Christian

5.7%

Methodist

3.2%

Pentecostal & Holiness

2.5%

Non-Christian

2.2%

Source · 2020 US Religion Census. Remaining 51.0% of residents not counted as adherents by any reporting body.

Home to Waterloo and the University of Northern Iowa, Black Hawk County sits at the intersection of a mid-size industrial city and a college town — a combination that has kept its presidential margins razor-thin in recent cycles.

The county's recent history is a story of close margins. The Democratic margin reached twenty-two points in 2008; the Republican margin reached fifty-eight points in 1920. Most other elections have been decided by single-digit points.

Black Hawk County's demographics — a population of 131,049, a 80% non-Hispanic-white share, a median household income of $66,417 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Ashland County and Guadalupe County.

Most similar counties

Black Hawk County delivered a near-tie in 2024.