akashic
1876–2024
18th Suffolk District·Massachusetts

Massachusetts 140th State House District has voted Democratic in twenty-five straight presidential cycles.

One of Massachusetts' most Democratic-leaning state house seats

1876 — 2024·38 elections
MA
Latest
D+52
in 2024
Archetype
Democratic loyalist
since the recent cycles
Population
38,961
2024 ACS

Massachusetts 140th State House District, Massachusetts: Democratic loyalist district. In 2024, voted D+52%. Democratic peak: D+73 in 1964.

Key facts

2024 presidential margin
D+52MIT Election Lab
Political archetype
Democratic loyalistAkashic typology
Population
38,9612024 5-year
Median household income
$95,6312024 5-year
White (non-Hispanic)
46.2%2024 5-year
Black
18.2%2024 5-year
Hispanic / Latino
23.2%2024 5-year
Peak Democratic margin
D+73 in 1964MIT Election Lab
Peak Republican margin
R+24 in 1896MIT 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
+52.1%
11,0313,29914,847
D
+62.8%
13,4252,90916,735
D
+61.6%
12,1952,50215,741
D
+56.7%
11,1112,97714,346
D
+55.7%
10,2792,83813,360
D
+53.0%
9,0612,72611,942
D
+50.9%
7,6862,20510,769
D
+53.1%
7,2251,9739,895
D
+37.2%
6,5962,55010,881
D
+29.7%
7,1303,82811,136
D
+24.9%
7,5714,54412,158
D
+18.6%
5,6283,63610,729
D
+26.4%
7,0474,00111,531
D
+32.0%
8,2504,23212,546
D
+57.4%
10,0942,42913,348
D
+72.7%
12,7621,99714,801
D
+49.2%
12,5464,25516,853
D
+8.0%
9,4908,08117,651
D
+19.5%
11,9578,04620,092
D
+41.5%
13,1815,24419,109
D
+25.4%
11,6366,91218,584
D
+27.2%
12,0706,87719,063
D
+36.4%
11,1034,78517,369
D
+37.2%
9,8654,40414,692
D
+34.4%
10,1534,93215,192
R
−11.7%
3,9065,19411,016
R
−21.8%
3,3525,3649,235
D
+17.5%
3,0292,1095,268
D
+22.4%
2,2861,2004,856
R
−2.7%
2,1722,2994,741
D
+8.1%
2,5662,1684,911
D
+7.2%
2,3592,0324,534
R
−24.5%
1,5752,6624,444
D
+11.3%
2,2081,7524,039
—
No data
———
—
No data
———
—
No data
———
—
No data
———

Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
12.5%
Italian
8.2%
English
5.3%
German
4.5%
American
2.3%
Polish
2.2%
French
1.6%
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: 33.9 in this county, 39.1 nationally
Male
Age
Female
0.6%
85+
1.1%
1.5%
75–84
2.2%
3.6%
65–74
4.3%
5.1%
55–64
5.4%
5.1%
45–54
5.4%
6.9%
35–44
6.9%
11.0%
25–34
11.3%
6.3%
18–24
7.4%
5.7%
5–17
5.5%
2.4%
<5
2.4%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$95,631
18th Suffolk District ranks near the middle of US counties.
18th Suffolk District$95,631
Massachusetts$103,960
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
16.2%
Children face moderate poverty.
Children under 1820.3%
Working age (18–64)14.9%
Seniors (65+)22.2%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
61.2%
speak English only
Spanish19.2%
Other Indo-European10.3%
Asian & Pacific Islander6.6%
Other languages2.7%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
42.2%
Non-Christian
7.1%
Other Christian
4.8%
Baptist
1.6%
Mainline Protestant
1.3%
Pentecostal & Holiness
1.2%
Methodist
0.6%
Source · 2020 US Religion Census. Remaining 41.2% of residents not counted as adherents by any reporting body.

The 18th Suffolk District posts presidential margins exceeding 58 points, reflecting a dense, heavily urban constituency in Greater Boston where Democratic candidates routinely face nominal general-election competition.

The Democratic margin in Massachusetts 140th State House District reached its widest at seventy-three points in 1964. The margin in 2024 was fifty-two points — still decisive.

Its loyalty is rooted in its place. Median household income of $95,631, a 46% non-Hispanic-white share, and a population of 38,961 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.
18th Suffolk District, Massachusetts. Akashic. https://akashic.app/sld-lower/25140/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did 18th Suffolk District, Massachusetts vote in 2024?
In 2024, 18th Suffolk District, Massachusetts voted Democratic by 52.1 points (D+52), carried by the Democratic candidate. Out of 14,847 votes cast, 11,031 went Democratic and 3,299 went Republican.
What is 18th Suffolk District, Massachusetts's political archetype?
Akashic classifies 18th Suffolk District, Massachusetts as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 30 times, Republican 4 times, and other 0 times.
When did 18th Suffolk District, Massachusetts last vote Republican?
The most recent presidential election in which 18th Suffolk District, Massachusetts voted Republican was 1924.
How many people live in 18th Suffolk District, Massachusetts?
18th Suffolk District, Massachusetts has a population of 38,961 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in 18th Suffolk District, Massachusetts?
Median household income in 18th Suffolk District, Massachusetts is $95,631 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of 18th Suffolk District, Massachusetts?
Akashic tracks 38 presidential elections in 18th Suffolk District, Massachusetts from 1876 to 2024. Of those, 30 went Democratic and 4 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.