akashic
1876–2024
Congressional District 9·Massachusetts

Massachusetts 9th Congressional District moved 8 points toward the Republican candidate between 2020 and 2024.

A coastal and suburban district where margins have narrowed in recent cycles

2008 — 2024·5 elections
MA
LatestD+11in 2024
TypologyDiversifying Metrocluster typology
Population897,0892024 ACS

Massachusetts 9th Congressional District: Diversifying Metro district. In 2024, voted D+11%. Democratic peak: D+18 in 2020.

Key facts

2024 presidential margin
D+11MIT Election Lab
Political typology
Diversifying MetroAkashic typology
Population
897,0892024 5-year
Median household income
$104,6202024 5-year
White (non-Hispanic)
79.1%2024 5-year
Black
5.8%2024 5-year
Hispanic / Latino
5.8%2024 5-year
Peak Democratic margin
D+18 in 2020MIT Election Lab
DW-NOMINATE
Member ideology
D
KEATING, William R.Congress 119 · Democratic
DW-NOMINATE first-dimension (economic) score-0.33 sits at approximately the 34th percentile.0-0.33−1 liberal+1 conservative
KEATING scores -0.33 on the first NOMINATE dimension (−1 most liberal, +1 most conservative).

Predecessors: LYNCH, Stephen F. (2011–2013), LYNCH, Stephen F. (2009–2011), LYNCH, Stephen F. (2007–2009), LYNCH, Stephen F. (2005–2007)

Source · Voteview / Lewis, Poole, Rosenthal et al. (CC-BY).
2024 presidential election
Congressional District 9
HarrisD+11
—
2024 presidential margin by county for Congressional District 9, MAA map of the constituent counties of Congressional District 9, MA, each outlined and filled by its 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic).Plymouth County, MA · D+9Dukes County, MA · D+52Nantucket County, MA · D+37Bristol County, MA · D+1Norfolk County, MA · D+29Barnstable County, MA · D+21
How it voted
Share of the 2024 vote
Kamala Harris ✓Democratic53.7%249,648
Donald TrumpRepublican43.1%200,402
OtherAll other candidates3.2%14,807
D+60
R+60
6 counties, each filled by 2024 D-vs-R margin. Hover any county for its result.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
Presidential margin over timeDemocratic-minus-Republican presidential margin from 2008 to 2024. Most recent: +10.6% in 2024.+10.6%DR20082024
Presidential margin over time
YearMargin (D minus R)
2008+14.6%
2012+9.8%
2016+9.9%
2020+18.1%
2024+10.6%
DemocraticRepublican
5 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
D
+10.6%
249,648200,402464,857
D
+18.1%
266,124182,960459,076
D
+9.9%
212,499171,514413,730
D
+9.8%
215,517177,189392,706
D
+14.6%
220,907163,728391,402
Congressional elections · 17 Senate races

U.S. Senate

Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
YearWonD %R %Total
2024D58.1%38.9%3,512,930
2020D64.5%32.2%3,658,005
2018D60.3%36.2%2,707,090
2014D59.0%36.2%2,186,789
2012D53.3%45.8%3,184,196
2008D63.6%29.8%3,102,995
2006D66.9%29.5%2,243,835
2002D72.3%0.0%2,220,301
2000D69.1%12.2%2,734,048
1996D52.2%44.7%2,555,942
1994D58.1%41.0%2,179,945
1990D54.5%41.0%2,424,579
1988D65.0%33.9%2,606,225
1984D55.1%44.9%2,530,471
1982D60.8%38.3%2,050,769
1978D55.1%44.8%1,985,700
1976D69.3%29.0%2,491,255

Demographics

2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
24.4%
English
13.3%
Italian
11.5%
German
5.8%
French
4.5%
American
3.5%
Scottish
2.2%
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.
2024 ACS
Age distribution by sex
Median age: 45.9 in this county, 39.1 nationally
Male
Age
Female
1.0%
85+
1.6%
3.0%
75–84
3.9%
6.2%
65–74
7.2%
7.5%
55–64
8.0%
6.0%
45–54
6.3%
5.8%
35–44
5.9%
5.5%
25–34
5.5%
4.0%
18–24
3.8%
7.3%
5–17
6.9%
2.4%
<5
2.3%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$104,620
Congressional District 9 ranks near the middle of US counties.
Congressional District 9$104,620
Massachusetts$103,960
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
8.0%
Child poverty is below the national average.
Children under 189.1%
Working age (18–64)7.4%
Seniors (65+)10.9%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
84.7%
speak English only
Other Indo-European9.8%
Spanish3.8%
Asian & Pacific Islander1.2%
Other languages0.6%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
30.8%
Other Christian
3.6%
Mainline Protestant
2.6%
Non-Christian
1.4%
Pentecostal & Holiness
0.8%
Methodist
0.8%
Baptist
0.7%
Source · 2020 US Religion Census. Remaining 59.3% of residents not counted as adherents by any reporting body.

Massachusetts's 9th stretches from the South Shore through Cape Cod and the Islands, blending working-class coastal communities with seasonal resort economies. The 2024 presidential margin of D+9.8 reflects a competitive lean rather than the deep-blue lock common elsewhere in the state.

Across the recorded series it reached a Democratic high of eighteen points in 2020. Between 2020 and 2024 the district moved eight points toward the Republican candidate; the 2024 margin was eleven points.

A population of 897,089, a 79% non-Hispanic-white share, and a median household income of $104,620 describe the district.

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.
Congressional District 9, Massachusetts. Akashic. https://akashic.app/cd/2509/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did Congressional District 9, Massachusetts vote in 2024?
In 2024, Congressional District 9, Massachusetts voted Democratic by 10.6 points (D+11), carried by the Democratic candidate. Out of 464,857 votes cast, 249,648 went Democratic and 200,402 went Republican.
What is Congressional District 9, Massachusetts's political typology?
Akashic places Congressional District 9, Massachusetts in the "Diversifying Metro" typology. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 5 elections in the dataset, the district has voted Democratic 5 times, Republican 0 times, and other 0 times.
How many people live in Congressional District 9, Massachusetts?
Congressional District 9, Massachusetts has a population of 897,089 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Congressional District 9, Massachusetts?
Median household income in Congressional District 9, Massachusetts is $104,620 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Congressional District 9, Massachusetts?
Akashic tracks 5 presidential elections in Congressional District 9, Massachusetts from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican. The district's typology — "Diversifying Metro" — captures where that record, its demographics, and its recent swing place it among American communities.