† 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
GroupRock ValleyIowaUnited States
Dutch31.7%2.7%—
German16.7%30.5%12.5%
American4.7%4.6%5.3%
Irish3.5%12.8%9.4%
English2.7%10.2%9.5%
Norwegian1.8%4.1%—
French0.9%—1.6%
Swedish0.9%1.9%—
Mexican29.0%5.0%11.3%
Guatemalan6.7%0.4%0.5%
Puerto Rican0.8%0.3%1.8%
Spaniard0.5%——
Spanish0.5%——
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
Rock Valley
Iowa
United States
Median age
35.1
38.8
39.1
Age 18–24
13.7%
10.0%
9.2%
Age 65 and older
19.0%
18.1%
17.2%
Household economy
Measure
Rock Valley
Iowa
United States
Median household income
$76,250
$75,059
$84,427
Poverty rate
9.3%
11.1%
12.5%
Bachelor's degree or higher (25+)
16.6%
31.8%
35.6%
Languages at home
Measure
Rock Valley
Iowa
United States
Speaks a non-English language at home
38.0%
9.2%
22.3%
Spanish
36.7%
4.7%
13.6%
Religious landscape
Measure
Rock Valley
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.
Rock Valley, Iowa
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−84.6%
2008
−76.1%
2012
−79.5%
2016
−79.7%
2020
−78.5%
2024
−78.1%
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
10.6%Harris214
88.7%Trump1,792
0.7%
R+78.1
D+0.4
R+76.6
2,021
R
10.3%Biden224
88.8%Trump1,929
0.9%
R+78.5
D+1.3
R+82.9
2,173
R
8.8%Clinton180
88.5%Trump1,819
2.8%
R+79.7
R+0.3
R+81.8
2,056
R
9.7%Obama189
89.1%Romney1,741
1.2%
R+79.5
R+3.4
R+83.3
1,953
R
11.3%Obama211
87.4%McCain1,630
1.3%
R+76.1
D+8.5
R+83.4
1,865
R
7.7%Kerry144
92.3%Bush1,732
0.1%
R+84.6
—
R+82.1
1,877
Rock Valley sits in Iowa's most reliably Republican county, where a tight-knit Dutch Reformed community has sustained turnout rates and vote margins that regularly outpace state averages.
Across the recorded series it reached a Republican high of 84.6 points in 2004. The 2024 margin was 78.1 points.
A population of 4,059, a 68% non-Hispanic-white share, and a median household income of $76,250 describe the city.
In 2024, Rock Valley, Iowa voted Republican by 78.1 points (R+78.1), carried by the Republican candidate. Out of 2,021 votes cast, 214 went Democratic and 1,792 went Republican.
How many people live in Rock Valley, Iowa?
Rock Valley, Iowa has a population of 4,059 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Rock Valley, Iowa?
Median household income in Rock Valley, Iowa is $76,250 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Rock Valley, Iowa?
Akashic tracks 6 presidential elections in Rock Valley, Iowa from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.