state house districtMassachusetts 66th State House District
presidential margin
2004–2024 · Democratic minus Republican
2004D+14.0
2008D+14.1
2012D+6.1
2016D+28.7
2020D+40.9
2024D+36.5
net swing · 2004→2024D+22.6D+14.0 → D+36.5
vs. U.S. · 2024D+38.0D+36.5 vs R+1.5
presidential returns
2024 turnout 88.2% of 30,525 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
17,807
7,968
1,159
26,934
30,525
88.2%
2020
18,426
7,509
750
26,685
29,961†
89.1%
2016
14,171
7,345
2,266
23,782
29,069†
81.8%
2012
12,024
10,611
398
23,033
27,791†
82.9%
2008
12,487
9,345
393
22,225
27,260†
81.5%
2004
11,932
8,985
207
21,124
26,729†
79.0%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupMA HD 8MassachusettsUnited States
Irish23.4%18.6%9.4%
Italian14.9%11.1%4.8%
English11.8%9.7%9.5%
German7.6%5.4%12.5%
American3.9%3.3%5.3%
Polish3.8%3.4%2.2%
French3.8%4.7%1.6%
French Canadian2.5%——
Chinese3.8%2.5%1.3%
Asian Indian3.0%1.9%1.4%
Vietnamese0.8%0.8%0.6%
Cambodian0.8%0.4%—
Korean0.6%0.4%0.4%
Taiwanese0.2%——
Nepalese0.2%——
Filipino0.2%0.2%0.9%
Puerto Rican0.9%4.6%1.8%
Salvadoran0.5%1.1%0.7%
Mexican0.4%0.8%11.3%
Dominican0.3%2.7%0.7%
Guatemalan0.3%0.8%0.5%
Colombian0.2%0.6%0.4%
African American†0.5%2.6%9.9%
Haitian0.2%1.1%0.3%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
MA HD 8
Massachusetts
United States
Median age
43.2
40.3
39.1
Age 18–24
9.6%
9.9%
9.2%
Age 65 and older
16.3%
17.9%
17.2%
Household economy
Measure
MA HD 8
Massachusetts
United States
Median household income
$184,238
$103,960
$84,427
Poverty rate
2.9%
10.1%
12.5%
Bachelor's degree or higher (25+)
59.4%
47.3%
35.6%
Languages at home
Measure
MA HD 8
Massachusetts
United States
Speaks a non-English language at home
28.4%
25.1%
22.3%
Spanish
6.3%
9.7%
13.6%
Other Indo-European
8.5%
6.1%
2.0%
Chinese (incl. Mandarin & Cantonese)
4.1%
2.2%
1.1%
Other Asian & Pacific Island
2.5%
1.2%
1.1%
Religious landscape
Measure
MA HD 8
Massachusetts
United States
Catholic
—
35.5%
18.6%
Evangelical Protestant
—
3.6%
16.5%
Unclaimed / not counted
—
51.4%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Massachusetts 66th State House District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+14.0%
2008
+14.1%
2012
+6.1%
2016
+28.7%
2020
+40.9%
2024
+36.5%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
66.1%Harris17,807
29.6%Trump7,968
4.3%
D+36.5
R+4.4
D+38.0
26,934
D
69.1%Biden18,426
28.1%Trump7,509
2.8%
D+40.9
D+12.2
D+36.5
26,685
D
59.6%Clinton14,171
30.9%Trump7,345
9.5%
D+28.7
D+22.6
D+26.6
23,782
D
52.2%Obama12,024
46.1%Romney10,611
1.7%
D+6.1
R+8.0
D+2.3
23,033
D
56.2%Obama12,487
42.0%McCain9,345
1.8%
D+14.1
D+0.2
D+6.9
22,225
D
56.5%Kerry11,932
42.5%Bush8,985
1.0%
D+14.0
—
D+16.4
21,124
current representation
Current officeholders
DJames Arena-DeRosaState House · 8th Middlesex
State legislative officeholder from OpenStates nightly current-legislator data.
The 8th Middlesex delivered a 36.5-point Democratic presidential margin in 2024, reflecting the dense, highly educated suburban electorate characteristic of inner Middlesex County's legislative districts.
Across the recorded series it reached a Democratic high of 40.9 points in 2020. Between 2020 and 2024 the district moved 4.4 points toward the Republican candidate; the 2024 margin was 36.5 points.
A population of 43,813, a 80% non-Hispanic-white share, and a median household income of $184,238 describe the district. The district's voting pattern over the last decade is most similar to that of 2nd Middlesex District and 14th Norfolk District.
Akashic
Political twins — state-house districts
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Massachusetts 66th State House District. Akashic. https://akashic.app/sld-lower/25066/. Accessed May 20, 2026. License: CC BY 4.0.
How did Massachusetts 66th State House District vote in 2024?
In 2024, Massachusetts 66th State House District voted Democratic by 36.5 points (D+36.5), carried by the Democratic candidate. Out of 26,934 votes cast, 17,807 went Democratic and 7,968 went Republican.
How many people live in Massachusetts 66th State House District?
Massachusetts 66th State House District has a population of 43,813 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Massachusetts 66th State House District?
Median household income in Massachusetts 66th State House District is $184,238 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Massachusetts 66th State House District?
Akashic tracks 6 presidential elections in Massachusetts 66th State House District from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
