Michigan 21st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
59.6%
40,526 votes · D+19.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 59.4%
Republican
Herbert Hoover1928
79.4%
24,888 votes · R+59.3 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 78.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
82,867votes
56.8% of the vote · D+15.7 · modeled estimate
Runner-up · Kamala Harris, 2024 · 80,747 votes
Republican
Ronald Reagan1984
66,102votes
65.3% of the vote · R+31.3 · modeled estimate
Runner-up · Donald Trump, 2024 · 62,497 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Kamala Harris2024
+14.0pts D vs U.S.
Place D+12.5 · U.S. R+1.5 · modeled estimate
Runner-up · Barack Obama, 2008 · +13.5 pts
Republican
Herbert Hoover1928
+41.8pts R vs U.S.
Place R+59.3 · U.S. R+17.5 · modeled estimate
Runner-up · William McKinley, 1896 · +39.2 pts
current representation
Current officeholders
DSarah AnthonyState Senate · 21
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 1 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
D
56.6%77,927
43.4%59,770
137,697
Its Democratic presidential margin was D+12.5 in 2024 and D+20.8 in 2008. About 265,000 residents lived here, with White alone at 73.9% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 20.8 points in 2008 and a Republican high of 62.4 points in 1924. Between 2020 and 2024 the district moved 3.2 points toward the Republican candidate; the 2024 margin was 12.5 points.
A population of 263,361, a 70% non-Hispanic-white share, and a median household income of $69,787 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 28 and State Senate District 19.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Michigan 21st State Senate District. Akashic. https://akashic.app/sld-upper/26021/. Accessed May 20, 2026. License: CC BY 4.0.
How did Michigan 21st State Senate District vote in 2024?
In 2024, Michigan 21st State Senate District voted Democratic by 12.5 points (D+12.5), carried by the Democratic candidate. Out of 145,904 votes cast, 80,747 went Democratic and 62,497 went Republican.
When did Michigan 21st State Senate District last vote Republican?
The most recent presidential election in which Michigan 21st State Senate District voted Republican was 1988.
How many people live in Michigan 21st State Senate District?
Michigan 21st State Senate District has a population of 263,361 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Michigan 21st State Senate District?
Median household income in Michigan 21st State Senate District is $69,787 — below the national median of $80,734. The Michigan state median is $72,875.
What is the political history of Michigan 21st State Senate District?
Akashic tracks 38 presidential elections in Michigan 21st State Senate District from 1876 to 2024. Of those, 12 went Democratic and 24 went Republican.