Plymouth County, Massachusetts: Democratic loyalist county. In 2024, voted D+9%. Republican peak: R+57 in 1896.
Key facts
- 2024 presidential margin
- D+9MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 535,0752024 5-year
- Median household income
- $114,2012024 5-year
- White (non-Hispanic)
- 77.0%2024 5-year
- Black
- 8.0%2024 5-year
- Hispanic / Latino
- 4.9%2024 5-year
- Peak Democratic margin
- D+37 in 1964MIT Election Lab
- Peak Republican margin
- R+57 in 1896MIT Election Lab
- Most similar
- Worcester County, MA · similarity 0.95
2024 results by precinct
2024 precinct map of Plymouth CountyPrecinct-level 2024 presidential results for Plymouth County, with each precinct boundary colored by Democratic-vs-Republican margin.
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Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 159,962 | 133,544 | 300,129 | ||
| D | 173,630 | 121,227 | 303,870 | ||
| D | 135,513 | 115,369 | 275,506 | ||
| D | 131,845 | 121,086 | 256,531 | ||
| D | 131,817 | 112,904 | 249,817 | ||
| D | 125,178 | 105,603 | 233,297 | ||
| D | 115,376 | 82,751 | 211,577 | ||
| D | 106,072 | 64,626 | 194,011 | ||
| D | 79,160 | 69,514 | 207,710 | ||
| R | 84,587 | 105,684 | 193,480 | ||
| R | 68,923 | 105,230 | 174,771 | ||
| R | 58,772 | 85,593 | 173,248 | ||
| D | 83,663 | 74,684 | 164,433 | ||
| R | 69,124 | 76,062 | 146,064 | ||
| D | 67,771 | 54,644 | 127,977 | ||
| D | 82,007 | 37,941 | 120,335 | ||
| R | 57,175 | 60,977 | 118,349 | ||
| R | 30,377 | 75,575 | 106,161 | ||
| R | 32,815 | 67,922 | 101,042 | ||
| R | 34,765 | 48,925 | 85,146 | ||
| R | 32,290 | 47,245 | 79,709 | ||
| R | 34,481 | 48,617 | 83,606 | ||
| R | 30,466 | 41,942 | 78,010 | ||
| R | 26,137 | 37,729 | 65,744 | ||
| R | 24,887 | 41,362 | 66,766 | ||
| R | 8,863 | 34,728 | 50,355 | ||
| R | 9,373 | 33,582 | 45,663 | ||
| R | 11,009 | 13,515 | 25,752 | ||
| O | 6,991 | 5,590 | 23,653 | ||
| R | 5,295 | 13,236 | 21,205 | ||
| R | 5,746 | 12,671 | 20,809 | ||
| R | 4,665 | 10,813 | 17,821 | ||
| R | 3,396 | 13,405 | 17,517 | ||
| R | 7,296 | 10,501 | 18,434 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
27.6%
Italian
13.1%
English
12.8%
German
5.3%
French
3.6%
American
3.6%
Scottish
2.5%
African American
6.4%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
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: 43.0 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$114,201
Plymouth County ranks in the top 0.5% of US counties.
Plymouth County$114,201
Massachusetts$103,960
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
7.1%
Child poverty is below the national average.
Children under 187.5%
Working age (18–64)6.5%
Seniors (65+)11.9%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
85.3%
speak English only
Other Indo-European10.0%
Spanish3.1%
Asian & Pacific Islander1.0%
Other languages0.6%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 56.9% of residents not counted as adherents by any reporting body.
Plymouth County backed Republican presidential candidates for decades before trending Democratic in recent cycles; its 2024 D+8.8 margin reflects a steady suburban and exurban realignment along Massachusetts's South Shore.
The Democratic margin in Plymouth County reached its widest at thirty-seven points in 1964. The margin in 2024 was nine points — still decisive.
Its loyalty is rooted in its place. Median household income of $114,201, a 77% non-Hispanic-white share, and a population of 535,075 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Worcester County and Essex County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Plymouth County, Massachusetts — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/25023/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More in Massachusetts
More democratic loyalist counties
Frequently asked questions
How did Plymouth County, Massachusetts vote in 2024?
In 2024, Plymouth County, Massachusetts voted Democratic by 8.8 points (D+9), carried by the Democratic candidate. Out of 300,129 votes cast, 159,962 went Democratic and 133,544 went Republican.
What is Plymouth County, Massachusetts's political archetype?
Akashic classifies Plymouth County, Massachusetts as a "Democratic loyalist" county based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the county has voted Democratic 12 times, Republican 21 times, and other 1 times.
When did Plymouth County, Massachusetts last vote Republican?
The most recent presidential election in which Plymouth County, Massachusetts voted Republican was 1988.
How many people live in Plymouth County, Massachusetts?
Plymouth County, Massachusetts has a population of 535,075 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Plymouth County, Massachusetts?
Median household income in Plymouth County, Massachusetts is $114,201 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Plymouth County, Massachusetts?
Akashic tracks 38 presidential elections in Plymouth County, Massachusetts from 1876 to 2024. Of those, 12 went Democratic and 21 went Republican. The county's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.