† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupOnawaIowaUnited States
German33.9%30.5%12.5%
Irish16.5%12.8%9.4%
American12.0%4.6%5.3%
English7.9%10.2%9.5%
Norwegian5.6%4.1%—
Swedish4.0%1.9%—
Danish3.4%——
Dutch2.3%2.7%—
Mexican1.1%5.0%11.3%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Onawa
Iowa
United States
Median age
35.5
38.8
39.1
Age 18–24
9.1%
10.0%
9.2%
Age 65 and older
21.4%
18.1%
17.2%
Household economy
Measure
Onawa
Iowa
United States
Median household income
$62,143
$75,059
$84,427
Poverty rate
16.3%
11.1%
12.5%
Bachelor's degree or higher (25+)
19.4%
31.8%
35.6%
Languages at home
Measure
Onawa
Iowa
United States
Speaks a non-English language at home
2.3%
9.2%
22.3%
Spanish
2.3%
4.7%
13.6%
Religious landscape
Measure
Onawa
Iowa
United States
Catholic
—
14.7%
18.6%
Evangelical Protestant
—
10.9%
16.5%
Unclaimed / not counted
—
55.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Onawa, Iowa
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−5.5%
2008
−3.6%
2012
−6.1%
2016
−36.4%
2020
−32.6%
2024
−39.0%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
29.9%Harris402
69.0%Trump926
1.1%
R+39.0
R+6.4
R+37.5
1,343
R
32.9%Biden465
65.6%Trump926
1.5%
R+32.6
D+3.7
R+37.1
1,412
R
29.1%Clinton388
65.4%Trump873
5.5%
R+36.4
R+30.2
R+38.4
1,334
R
46.0%Obama639
52.2%Romney724
1.8%
R+6.1
R+2.5
R+10.0
1,388
R
47.3%Obama675
50.9%McCain727
1.8%
R+3.6
D+1.9
R+10.9
1,428
R
47.2%Kerry717
52.7%Bush801
0.1%
R+5.5
—
R+3.1
1,519
Onawa sits on a terrace above the Missouri River floodplain and serves as the commercial hub for a thinly populated agricultural county where Republican margins in statewide races have widened steadily over the past decade.
Across the recorded series it reached a Republican high of 39.0 points in 2024. Between 2020 and 2024 the city moved 6.4 points toward the Republican candidate; the 2024 margin was 39.0 points.
A population of 2,839, a 93% non-Hispanic-white share, and a median household income of $62,143 describe the city.
In 2024, Onawa, Iowa voted Republican by 39.0 points (R+39.0), carried by the Republican candidate. Out of 1,343 votes cast, 402 went Democratic and 926 went Republican.
How many people live in Onawa, Iowa?
Onawa, Iowa has a population of 2,839 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Onawa, Iowa?
Median household income in Onawa, Iowa is $62,143 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Onawa, Iowa?
Akashic tracks 6 presidential elections in Onawa, Iowa from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
