Akashic
1892–2024
Akashic
Massachusetts 9th Congressional District
presidential margin
2008D+14.62012D+9.82016D+9.92020D+18.12024D+10.6
full record · 2008 → 2024
D+10.6
2024
median income$100,749U.S. $80,734 · MA $103,960
median age46.8U.S. 39.1 · MA 40.3
poverty rate8.2%U.S. 12.5% · MA 10.1%
bachelor’s+ (25+)42.1%U.S. 35.6% · MA 47.3%
non-english15.3%U.S. 22.3% · MA 25.1%
race · ethnicity · ancestry
Irish26.3%
English14.3%
Italian12.4%
Puerto Rican2.1%
Dominican0.7%
Mexican0.5%
Cape Verdean1.5%
Haitian0.7%
African American†0.3%
Chinese0.4%
Asian Indian0.2%
religion

Religious adherence is published only at the county level (U.S. Religion Census). See Dukes County.

American Community Survey 2024 5-year (income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024.

Massachusetts 9th Congressional District

Akashic
2024 presidential electionMassachusetts 9th Congressional DistrictHarrisD+10.6
Massachusetts 9th Congressional District premium atlas map: Harris D+10.6, 248 precincts, 11 city labels.
2024
248 precincts by 2024 margin · 11 cities, own margin · ◎ bluest & reddest city
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
current representation
Current officeholders
DWilliam KeatingU.S. House · MA-09-0.33
DEd MarkeyU.S. Senate-0.52
DElizabeth WarrenU.S. Senate-0.74

Federal officeholders only. State and local officeholders are planned for the next data pass.

Source · Voteview HSall_members.csv.
Congressional elections · 25 House races · 17 Senate races

U.S. House

Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.

Source · MIT Election Lab (MEDSL), House. CC-BY 4.0.
YearDistrictWonDemocraticRepublicanTotal
20249D
54.2%251,931
41.7%193,822
465,097
20229D
57.8%197,823
39.8%136,347
342,455
20209D
61.3%260,262
36.3%154,261
424,601
20189D
59.4%192,347
40.6%131,463
323,928
20169D
55.7%211,790
33.6%127,803
379,895
20149D
54.9%140,413
45.0%114,971
255,541
20129D
58.7%212,754
32.2%116,531
362,405
20109D
68.3%157,071
26.1%59,965
229,964
20089D
98.7%242,166
0.0%0
245,294
20069D
78.1%169,420
21.7%47,114
217,036
20049D
99.0%218,167
0.0%0
220,312
20029D
99.5%168,055
0.0%0
168,976
20009D
77.6%193,020
19.6%48,672
248,756
19989D
99.4%150,667
0.0%0
151,555
19969D
72.2%172,009
27.7%66,079
238,152
19949D
69.8%146,287
30.2%63,369
209,698
19929D
69.2%175,550
21.4%54,291
253,634
19909D
62.0%124,534
0.0%0
200,997
19889D
99.8%160,799
0.0%0
161,042
19869D
73.7%110,026
0.0%0
149,271
19849D
99.9%153,132
0.0%0
153,252
19829D
64.1%102,665
34.3%55,030
160,225
19809D
100.0%104,010
0.0%0
104,046
19789D
91.8%106,805
0.0%0
116,338
19769D
69.6%103,901
23.1%34,547
149,371

U.S. Senate

Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
YearWonDemocraticRepublicanTotal
2024D
59.8%2,041,668
40.0%1,365,440
3,413,329
2020D
66.3%2,357,809
33.1%1,177,765
3,556,708
2018D
60.3%1,633,371
36.2%979,210
2,707,090
2014D
61.9%1,289,944
38.0%791,950
2,084,966
2012D
53.7%1,696,346
46.2%1,458,048
3,156,553
2008D
65.9%1,971,974
30.9%926,044
2,994,247
2006D
69.3%1,500,738
30.5%661,532
2,165,490
2002D
81.0%1,605,976
0.0%0
1,981,860
2000D
72.7%1,889,494
12.9%334,341
2,599,420
1996D
52.2%1,334,135
44.7%1,143,120
2,555,942
1994D
58.1%1,265,997
41.0%894,000
2,179,945
1990D
54.5%1,321,712
41.0%992,917
2,424,579
1988D
65.0%1,693,344
33.9%884,267
2,606,225
1984D
55.1%1,393,150
44.9%1,136,913
2,530,471
1982D
60.8%1,247,084
38.3%784,602
2,050,564
1978D
55.1%1,093,283
44.8%890,584
1,985,700
1976D
69.3%1,726,657
29.0%722,641
2,491,255

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 heavily Democratic lock common elsewhere in the state.

Across the recorded series it reached a Democratic high of 18.1 points in 2020. Between 2020 and 2024 the district moved 7.5 points toward the Republican candidate; the 2024 margin was 10.6 points.

A population of 777,724, a 84% non-Hispanic-white share, and a median household income of $100,749 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 6 and Congressional District 4.

Political twins — districts

The congressional districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.

Congressional District 6
Massachusetts
83.1twin score
% Evangelical% Catholicelasticity≠ median age
Congressional District 4
Massachusetts
81.9twin score
elasticity% EvangelicalIrish ancestry≠ median age
Congressional District 2
New Hampshire
71.8twin score
elasticity% Evangelical% White≠ population scale

Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.

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 →

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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Massachusetts 9th Congressional District. Akashic. https://akashic.app/cd/2509/. Accessed May 20, 2026. License: CC BY 4.0.
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Places within Massachusetts 9th Congressional District

counties it covers5
Barnstable CountyBristol CountyDukes CountyNantucket CountyPlymouth County

Frequently asked questions

How did Massachusetts 9th Congressional District vote in 2024?
In 2024, Massachusetts 9th Congressional District voted Democratic by 10.6 points (D+10.6), carried by the Democratic candidate. Out of 464,857 votes cast, 249,648 went Democratic and 200,402 went Republican.
How many people live in Massachusetts 9th Congressional District?
Massachusetts 9th Congressional District has a population of 777,724 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Massachusetts 9th Congressional District?
Median household income in Massachusetts 9th Congressional District is $100,749 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Massachusetts 9th Congressional District?
Akashic tracks 5 presidential elections in Massachusetts 9th Congressional District from 2008 to 2024. Of those, 5 went Democratic and 0 went Republican.