akashic
1876–2024
Assembly District 18·California

California 18th State House District has voted Democratic in seventeen straight presidential cycles.

One of California's most lopsided legislative districts by presidential margin

1876 — 2024·38 elections
CA
Latest
D+54
in 2024
Archetype
Democratic loyalist
since the recent cycles
Population
162,164
2024 ACS

California 18th State House District, California: Democratic loyalist district. In 2024, voted D+54%. Democratic peak: D+64 in 2016.

Key facts

2024 presidential margin
D+54MIT Election Lab
Political archetype
Democratic loyalistAkashic typology
Population
162,1642024 5-year
Median household income
$129,4152024 5-year
White (non-Hispanic)
29.8%2024 5-year
Black
9.6%2024 5-year
Hispanic / Latino
23.4%2024 5-year
Peak Democratic margin
D+64 in 2016MIT Election Lab
Peak Republican margin
R+55 in 1924MIT Election Lab
2024 results by constituent county
2 counties · 2 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
+53.6%
49,17113,83565,904
D
+62.3%
60,77913,39176,114
D
+63.6%
50,6869,42264,904
D
+60.6%
46,22910,63058,732
D
+59.4%
48,14711,74761,298
D
+52.0%
41,61412,86155,321
D
+45.3%
33,76711,72048,657
D
+42.8%
29,92410,47245,472
D
+42.5%
32,91110,74752,165
D
+30.9%
30,54215,99947,121
D
+18.7%
27,77018,91147,313
D
+10.4%
19,85715,58741,093
D
+19.8%
23,21315,28740,122
D
+12.2%
25,52119,86746,380
D
+16.3%
21,63915,08940,125
D
+33.0%
27,97614,07642,102
D
+8.5%
21,42318,06739,636
R
−5.1%
17,17019,02836,315
R
−5.2%
17,15719,04336,495
D
+1.2%
15,26714,87331,941
D
+15.9%
16,77712,15029,063
D
+11.7%
14,66311,55126,540
D
+28.7%
14,7798,11623,192
D
+8.6%
10,5338,80020,198
R
−31.5%
6,03811,68317,899
R
−55.3%
7938,03413,096
R
−48.8%
2,1287,24210,487
R
−7.3%
4,3475,08510,120
O
+36.9%
2,43006,588
R
−42.5%
7132,1203,307
R
−53.7%
4451,8992,707
R
−34.1%
6741,4312,221
R
−22.1%
8471,3402,227
R
−8.6%
7228811,856
R
−19.6%
5818861,559
R
−21.6%
4817521,253
R
−19.3%
3995931,003
R
−18.6%
344501846

Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
5.8%
English
5.5%
Irish
5.4%
Italian
3.0%
American
1.8%
French
1.3%
Polish
1.1%
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: 39.0 in this county, 39.1 nationally
Male
Age
Female
0.7%
85+
1.2%
2.0%
75–84
2.5%
4.2%
65–74
4.8%
6.0%
55–64
6.1%
6.7%
45–54
6.6%
8.1%
35–44
7.8%
7.8%
25–34
7.8%
4.0%
18–24
4.0%
7.5%
5–17
7.1%
2.7%
<5
2.6%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$129,415
Assembly District 18 ranks near the middle of US counties.
Assembly District 18$129,415
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
9.2%
Child poverty is below the national average.
Children under 188.8%
Working age (18–64)9.0%
Seniors (65+)13.2%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
52.8%
speak English only
Asian & Pacific Islander19.7%
Spanish16.7%
Other Indo-European9.0%
Other languages1.8%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
19.9%
Other Christian
7.3%
Non-Christian
7.1%
Baptist
2.6%
Pentecostal & Holiness
2.2%
Mainline Protestant
1.2%
Methodist
0.7%
Source · 2020 US Religion Census. Remaining 59.0% of residents not counted as adherents by any reporting body.

With a 2024 presidential margin exceeding 72 points Democratic, AD-18 ranks among the most heavily one-sided state house districts in the country, reflecting dense urban concentration and a electorate with exceptionally low two-party competition.

The Democratic margin in California 18th State House District reached its widest at sixty-four points in 2016. The margin in 2024 was fifty-four points — still decisive.

Its loyalty is rooted in its place. Median household income of $129,415, a 30% non-Hispanic-white share, and a population of 162,164 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.
Assembly District 18, California. Akashic. https://akashic.app/sld-lower/06018/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did Assembly District 18, California vote in 2024?
In 2024, Assembly District 18, California voted Democratic by 53.6 points (D+54), carried by the Democratic candidate. Out of 65,904 votes cast, 49,171 went Democratic and 13,835 went Republican.
What is Assembly District 18, California's political archetype?
Akashic classifies Assembly District 18, California as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 22 times, Republican 15 times, and other 1 times.
When did Assembly District 18, California last vote Republican?
The most recent presidential election in which Assembly District 18, California voted Republican was 1956.
How many people live in Assembly District 18, California?
Assembly District 18, California has a population of 162,164 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Assembly District 18, California?
Median household income in Assembly District 18, California is $129,415 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Assembly District 18, California?
Akashic tracks 38 presidential elections in Assembly District 18, California from 1876 to 2024. Of those, 22 went Democratic and 15 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.