akashic
1876–2024
State House District 66·Missouri

Missouri 66th State House District has voted Democratic in nine straight presidential cycles.

One of Missouri's most Democratic-leaning legislative districts

1876 — 2024·38 elections
MO
Latest
D+23
in 2024
Archetype
Democratic loyalist
since the recent cycles
Population
50,454
2024 ACS

Missouri 66th State House District, Missouri: Democratic loyalist district. In 2024, voted D+23%. Republican peak: R+43 in 1904.

Key facts

2024 presidential margin
D+23MIT Election Lab
Political archetype
Democratic loyalistAkashic typology
Population
50,4542024 5-year
Median household income
$82,9362024 5-year
White (non-Hispanic)
62.1%2024 5-year
Black
24.1%2024 5-year
Hispanic / Latino
3.9%2024 5-year
Peak Democratic margin
D+24 in 1932MIT Election Lab
Peak Republican margin
R+43 in 1904MIT Election Lab
2024 results by constituent county
1 counties · 1 D · 0 R
R+60
D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
D
+23.4%
15,4899,52725,478
D
+24.0%
16,63010,11027,186
D
+16.2%
14,53010,25926,337
D
+13.6%
15,05611,39026,865
D
+19.9%
16,88211,23628,372
D
+9.3%
14,96412,41527,517
D
+5.3%
12,70211,38724,674
D
+6.4%
11,4299,93823,427
D
+8.9%
11,9489,54227,101
R
−9.6%
10,97413,31724,360
R
−28.0%
8,77515,59324,367
R
−14.6%
9,77113,35524,570
R
−11.1%
9,97912,51722,938
R
−24.3%
8,14913,38621,536
R
−3.8%
8,4029,14019,530
D
+22.6%
10,8286,84017,667
D
+2.6%
8,4388,00716,445
R
−6.2%
6,1776,99913,176
R
−10.0%
4,8385,92010,768
R
−5.2%
3,1773,5276,760
R
−5.2%
2,9283,2506,196
R
−12.1%
2,6553,3916,069
D
+15.8%
3,2042,3085,681
D
+23.6%
2,9921,8184,979
R
−11.4%
1,7132,1573,885
R
−22.2%
8151,3522,424
R
−31.9%
6301,2671,994
R
−23.8%
3846331,047
R
−5.0%
274313787
R
−36.9%
229516777
R
−42.6%
145374538
R
−25.2%
196331536
R
−29.1%
172315491
R
−16.4%
158221383
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Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
22.3%
Irish
12.2%
English
9.1%
American
5.5%
Italian
4.6%
Polish
2.4%
French
2.4%
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: 40.3 in this county, 39.1 nationally
Male
Age
Female
0.8%
85+
1.6%
2.4%
75–84
3.2%
5.0%
65–74
6.1%
6.3%
55–64
7.0%
5.6%
45–54
6.2%
6.2%
35–44
6.6%
6.2%
25–34
6.5%
4.2%
18–24
4.2%
8.4%
5–17
8.0%
2.9%
<5
2.7%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$82,936
State House District 66 ranks near the middle of US counties.
State House District 66$82,936
Missouri$70,702
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
9.8%
Child poverty is below the national average.
Children under 1813.5%
Working age (18–64)8.7%
Seniors (65+)9.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
89.5%
speak English only
Other Indo-European3.8%
Asian & Pacific Islander3.0%
Spanish2.6%
Other languages1.1%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
25.9%
Other Christian
10.0%
Baptist
5.1%
Mainline Protestant
3.2%
Non-Christian
2.7%
Methodist
2.1%
Pentecostal & Holiness
1.7%
Source · 2020 US Religion Census. Remaining 49.3% of residents not counted as adherents by any reporting body.

With a 2024 presidential margin of D+74.2, this St. Louis-area district ranks among the most reliably Democratic state house seats in Missouri, reflecting dense urban settlement and a heavily minority population.

The Democratic margin in Missouri 66th State House District reached its widest at twenty-four points in 2020. The margin in 2024 was twenty-three points — still decisive.

Its loyalty is rooted in its place. Median household income of $82,936, a 62% non-Hispanic-white share, and a population of 50,454 together describe a district whose political habits are deeply settled.

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.
State House District 66, Missouri. Akashic. https://akashic.app/sld-lower/29066/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State House District 66, Missouri vote in 2024?
In 2024, State House District 66, Missouri voted Democratic by 23.4 points (D+23), carried by the Democratic candidate. Out of 25,478 votes cast, 15,489 went Democratic and 9,527 went Republican.
What is State House District 66, Missouri's political archetype?
Akashic classifies State House District 66, Missouri as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 13 times, Republican 21 times, and other 0 times.
When did State House District 66, Missouri last vote Republican?
The most recent presidential election in which State House District 66, Missouri voted Republican was 1988.
How many people live in State House District 66, Missouri?
State House District 66, Missouri has a population of 50,454 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State House District 66, Missouri?
Median household income in State House District 66, Missouri is $82,936 — above the national median of $80,734. The Missouri state median is $70,702.
What is the political history of State House District 66, Missouri?
Akashic tracks 38 presidential elections in State House District 66, Missouri from 1876 to 2024. Of those, 13 went Democratic and 21 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.