St. Louis, MO-IL · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
68.0%
651,269 votes · D+35.9
Runner-up · Franklin D. Roosevelt, 1932 · 62.9%
Republican
Warren G. Harding1920
58.1%
281,147 votes · R+23.1
Runner-up · Ronald Reagan, 1984 · 57.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
825,040votes
57.5% of the vote · D+16.1
Runner-up · Joe Biden, 2020 · 742,085 votes
Republican
Donald Trump2020
693,693votes
47.3% of the vote · D+3.3
Runner-up · Donald Trump, 2024 · 687,523 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
Adlai Stevenson1956
+22.8pts D vs U.S.
Place D+7.4 · U.S. R+15.4
Runner-up · Adlai Stevenson, 1952 · +21.3 pts
Republican
William H. Taft1912
+10.9pts R vs U.S.
Place D+8.6 · U.S. D+19.5
Runner-up · Charles E. Hughes, 1916 · +8.8 pts
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
On a multi-state Place, each row sums votes cast in the separate U.S. House races held inside the Place that year. It is a geographic vote total, not one contest or a seat tally.
St. Louis, MO-IL · how this place’s counties split between candidates in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain and there is no roll-up above it. Each cell counts how many of this place’s counties a candidate led — a count of records, not a vote total. Who led the place as a whole is not knowable from these returns, because county rows carry a leader and a lead but no per-candidate votes.
Presidential nominating contests in St. Louis, MO-IL, by party and cycle.
Party
2008
2012
2016
2020
2024
Democratic
Obama9Clinton6459,978 votes · 15 of 15 countiesprimary
○no contest record
Sanders12Clinton3394,087 votes · 15 of 15 countiesprimary
Biden15382,899 votes · 15 of 15 countiesprimary
○no contest record
Republicannot ingested
○no contest record
○no contest record
○no contest record
○no contest record
○no contest record
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
voter registration
Registered voters
Total registered voters, over time
Registered voters
Voter registration in St. Louis, MO-IL
Year
Total registered
2016
2,051,618
2018
1,994,557
2020
1,905,191
2022
2,017,251
2024
2,073,660
domestic migration
Who moves in and out
Net domestic migration over time
−1,382 net domestic migration · 2025
20112025
Net −114,481 over 2011–2025 · gain loss
Domestic migration in St. Louis, MO-IL in St. Louis, MO-IL: net domestic migration by year
Year
Net domestic migration
2011
−9,219
2012
−11,077
2013
−8,165
2014
−7,953
2015
−7,845
2016
−12,341
2017
−9,748
2018
−9,435
2019
−7,685
2021
−5,657
2022
−13,896
2023
−5,980
2024
−4,098
2025
−1,382
St. Louis has lost population in its urban core for decades while inner-ring suburbs have absorbed growth, producing a fragmented political map where city precincts, older suburbs, and exurban counties routinely return starkly different margins.
Across the recorded series it reached a Democratic high of 35.9 points in 1964 and a Republican high of 23.1 points in 1920. Between 2020 and 2024 the metro moved 2.5 points toward the Republican candidate; the 2024 margin was 0.8 points.
A population of 2,810,850, a 71% non-Hispanic-white share, and a median household income of $81,650 describe the metro. The metro's voting pattern over the last decade is most similar to that of Philadelphia-Camden-Wilmington, PA-NJ-DE-MD and Detroit-Warren-Dearborn, MI.
Akashic
Political twins — metros
The metros 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 →
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St. Louis, MO-IL, Illinois. Akashic. https://akashic.app/cbsa/41180/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, St. Louis, MO-IL, Illinois voted Democratic by 0.8 points (D+0.8), carried by the Democratic candidate. Out of 1,411,137 votes cast, 698,935 went Democratic and 687,523 went Republican.
When did St. Louis, MO-IL, Illinois last vote Republican?
The most recent presidential election in which St. Louis, MO-IL, Illinois voted Republican was 2016.
How many people live in St. Louis, MO-IL, Illinois?
St. Louis, MO-IL, Illinois has a population of 2,810,850 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in St. Louis, MO-IL, Illinois?
Median household income in St. Louis, MO-IL, Illinois is $81,650 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of St. Louis, MO-IL, Illinois?
Akashic tracks 34 presidential elections in St. Louis, MO-IL, Illinois from 1892 to 2024. Of those, 23 went Democratic and 11 went Republican.
