state senate districtIowa 38th State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004D+0.3
2008D+11.6
2012D+6.3
2016R+2.9
2020D+0.3
2024R+5.2
net swing · 2004→2024R+5.5D+0.3 → R+5.2
vs. U.S. · 2024R+3.7R+5.2 vs R+1.5
presidential returns
2024 turnout 70.7% of 49,942 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
16,444
18,269
609
35,322
49,942
70.7%
2020
17,679
17,578
736
35,993
49,980†
72.0%
2016
15,530
16,550
2,707
34,787
51,083†
68.1%
2012
17,856
15,722
553
34,131
50,511†
67.6%
2008
17,918
14,129
605
32,652
49,295†
66.2%
2004
16,208
16,109
116
32,433
48,079†
67.5%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. 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
GroupIA SD 38IowaUnited States
German34.6%30.5%12.5%
Irish13.1%12.8%9.4%
English9.6%10.2%9.5%
American5.2%4.6%5.3%
Norwegian4.6%4.1%—
Dutch2.3%2.7%—
French1.7%—1.6%
Italian1.6%1.6%4.8%
Mexican1.7%5.0%11.3%
Guatemalan0.4%0.4%0.5%
Puerto Rican0.2%0.3%1.8%
African American†2.3%2.6%9.9%
Burmese0.8%0.3%—
Asian Indian0.3%0.5%1.4%
Vietnamese0.3%0.3%0.6%
Korean0.3%0.2%0.4%
Chinese0.2%0.3%1.3%
Filipino0.2%0.2%0.9%
Marshallese0.3%——
Aztec0.2%——
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
IA SD 38
Iowa
United States
Median age
33.8
38.8
39.1
Age 18–24
13.5%
10.0%
9.2%
Age 65 and older
18.0%
18.1%
17.2%
Household economy
Measure
IA SD 38
Iowa
United States
Median household income
$79,882
$75,059
$84,427
Poverty rate
14.1%
11.1%
12.5%
Bachelor's degree or higher (25+)
29.3%
31.8%
35.6%
Languages at home
Measure
IA SD 38
Iowa
United States
Speaks a non-English language at home
8.5%
9.2%
22.3%
Spanish
3.4%
4.7%
13.6%
Russian, Polish, or other Slavic
1.4%
0.4%
0.7%
Other Asian & Pacific Island
1.3%
1.0%
1.1%
Religious landscape
Measure
IA SD 38
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.
Iowa 38th State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+0.3%
2008
+11.6%
2012
+6.3%
2016
−2.9%
2020
+0.3%
2024
−5.2%
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
46.6%Harris16,444
51.7%Trump18,269
1.7%
R+5.2
R+5.4
R+3.7
35,322
D
49.1%Biden17,679
48.8%Trump17,578
2.0%
D+0.3
D+3.2
R+4.2
35,993
R
44.6%Clinton15,530
47.6%Trump16,550
7.8%
R+2.9
R+9.2
R+5.0
34,787
D
52.3%Obama17,856
46.1%Romney15,722
1.6%
D+6.3
R+5.4
D+2.4
34,131
D
54.9%Obama17,918
43.3%McCain14,129
1.9%
D+11.6
D+11.3
D+4.3
32,652
D
50.0%Kerry16,208
49.7%Bush16,109
0.4%
D+0.3
—
D+2.8
32,433
current representation
Current officeholders
RDave SiresState Senate · 38
State legislative officeholder from OpenStates nightly current-legislator data.
In 2024 it voted Republican by R+5.2, against D+11.6 in 2008, having changed party at least once across the five cycles. About 54,000 residents lived here, with White alone at 80.7% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 11.6 points in 2008 and a Republican high of 5.2 points in 2024. Between 2020 and 2024 the district moved 5.4 points toward the Republican candidate; the 2024 margin was 5.2 points.
A population of 63,383, a 89% non-Hispanic-white share, and a median household income of $79,882 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 18 and State Senate District 7.
Akashic
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Iowa 38th State Senate District. Akashic. https://akashic.app/sld-upper/19038/. Accessed May 20, 2026. License: CC BY 4.0.
How did Iowa 38th State Senate District vote in 2024?
In 2024, Iowa 38th State Senate District voted Republican by 5.2 points (R+5.2), carried by the Republican candidate. Out of 35,322 votes cast, 16,444 went Democratic and 18,269 went Republican.
When did Iowa 38th State Senate District last vote Democratic?
The most recent presidential election in which Iowa 38th State Senate District voted Democratic was 2020.
How many people live in Iowa 38th State Senate District?
Iowa 38th State Senate District has a population of 63,383 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iowa 38th State Senate District?
Median household income in Iowa 38th State Senate District is $79,882 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Iowa 38th State Senate District?
Akashic tracks 6 presidential elections in Iowa 38th State Senate District from 2004 to 2024. Of those, 4 went Democratic and 2 went Republican.
