St. Louis, MO-IL, Illinois: Bellwether metro. In 2024, voted D+1%. Democratic peak: D+36 in 1964.
Key facts
- 2024 presidential margin
- D+1MIT Election Lab
- Political archetype
- BellwetherAkashic typology
- Population
- 2,810,8502024 5-year
- Median household income
- $81,6502024 5-year
- White (non-Hispanic)
- 71.4%2024 5-year
- Black
- 17.2%2024 5-year
- Hispanic / Latino
- 4.0%2024 5-year
- Peak Democratic margin
- D+36 in 1964MIT Election Lab
- Peak Republican margin
- R+23 in 1920MIT Election Lab
Constituent county margins for St. Louis, MO-IL, ILOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 698,935 | 687,523 | 1,413,912 | ||
| D | 742,085 | 693,693 | 1,466,285 | ||
| R | 645,962 | 656,719 | 1,385,633 | ||
| D | 713,828 | 619,990 | 1,360,675 | ||
| D | 825,040 | 593,436 | 1,434,418 | ||
| D | 716,493 | 612,347 | 1,336,327 | ||
| D | 614,278 | 521,580 | 1,164,529 | ||
| D | 551,340 | 406,823 | 1,067,786 | ||
| D | 579,480 | 378,791 | 1,213,824 | ||
| D | 544,743 | 528,195 | 1,076,942 | ||
| R | 463,885 | 628,521 | 1,093,749 | ||
| R | 485,904 | 538,410 | 1,079,222 | ||
| D | 528,831 | 485,716 | 1,031,281 | ||
| R | 431,533 | 551,856 | 985,032 | ||
| D | 466,471 | 384,520 | 963,200 | ||
| D | 651,269 | 307,060 | 958,329 | ||
| D | 566,706 | 418,547 | 985,802 | ||
| D | 489,301 | 421,679 | 911,410 | ||
| D | 503,319 | 407,563 | 912,277 | ||
| D | 433,754 | 297,205 | 736,202 | ||
| D | 399,036 | 321,324 | 722,825 | ||
| D | 441,894 | 370,111 | 815,267 | ||
| D | 481,509 | 270,854 | 775,050 | ||
| D | 433,564 | 237,340 | 689,217 | ||
| D | 317,678 | 313,377 | 634,456 | ||
| R | 169,091 | 250,988 | 492,374 | ||
| R | 169,605 | 281,147 | 483,683 | ||
| R | 154,130 | 173,119 | 337,875 | ||
| D | 103,818 | 82,476 | 246,750 | ||
| R | 109,223 | 133,495 | 254,238 | ||
| R | 89,380 | 111,288 | 212,867 | ||
| R | 106,323 | 110,734 | 223,229 | ||
| R | 95,029 | 114,081 | 211,338 | ||
| D | 74,699 | 71,900 | 150,844 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
25.4%
Irish
12.7%
English
10.1%
American
5.8%
Italian
4.5%
French
2.7%
Polish
2.3%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 40.0 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$81,650
St. Louis, MO-IL ranks near the middle of US counties.
St. Louis, MO-IL$81,650
Illinois$70,702
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
10.5%
Child poverty is below the national average.
Children under 1813.8%
Working age (18–64)9.6%
Seniors (65+)10.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
93.1%
speak English only
Spanish2.3%
Other Indo-European2.2%
Asian & Pacific Islander1.8%
Other languages0.6%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 49.2% of residents not counted as adherents by any reporting body.
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.
The Democratic margin in St. Louis, MO-IL has rarely exceeded thirty-six points in modern history; the Republican margin has rarely exceeded twenty-three points. 2024 delivered the metro to the Democratic candidate by one points.
Its demographics resemble the country more than they resemble most metros. A 71% non-Hispanic-white share, a 11% poverty rate, and a median household income of $81,650 — all within the broad national range.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
St. Louis, MO-IL, Illinois — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cbsa/41180/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did St. Louis, MO-IL, Illinois vote in 2024?
In 2024, St. Louis, MO-IL, Illinois voted Democratic by 0.8 points (D+1), carried by the Democratic candidate. Out of 1,413,912 votes cast, 698,935 went Democratic and 687,523 went Republican.
What is St. Louis, MO-IL, Illinois's political archetype?
Akashic classifies St. Louis, MO-IL, Illinois as a "Bellwether" metro based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the metro has voted Democratic 23 times, Republican 11 times, and other 0 times.
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 $70,702.
What is the political history of St. Louis, MO-IL, Illinois?
Akashic tracks 38 presidential elections in St. Louis, MO-IL, Illinois from 1876 to 2024. Of those, 23 went Democratic and 11 went Republican. The metro's archetype — "Bellwether" — captures the overall trajectory of that voting record.