Suffolk County, Massachusetts: New American county. In 2024, voted D+52%. Democratic peak: D+73 in 1964.
Key facts
- 2024 presidential margin
- D+52MIT Election Lab
- Political typology
- New AmericanAkashic typology
- Population
- 785,1212024 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
- Most similar
- Orleans Parish, LA · similarity 1.00
2024 results by precinct
2024 precinct map of Suffolk CountyPrecinct-level 2024 presidential results for Suffolk County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | +11.3% |
| 1896 | −24.4% |
| 1900 | +7.2% |
| 1904 | +8.1% |
| 1908 | −2.7% |
| 1912 | +22.4% |
| 1916 | +17.5% |
| 1920 | −21.8% |
| 1924 | −11.7% |
| 1928 | +34.4% |
| 1932 | +37.2% |
| 1936 | +36.4% |
| 1940 | +27.2% |
| 1944 | +25.4% |
| 1948 | +41.5% |
| 1952 | +19.5% |
| 1956 | +8.0% |
| 1960 | +49.2% |
| 1964 | +72.7% |
| 1968 | +57.4% |
| 1972 | +32.0% |
| 1976 | +26.4% |
| 1980 | +18.6% |
| 1984 | +24.9% |
| 1988 | +29.7% |
| 1992 | +37.2% |
| 1996 | +53.1% |
| 2000 | +50.9% |
| 2004 | +53.1% |
| 2008 | +55.7% |
| 2012 | +56.7% |
| 2016 | +61.6% |
| 2020 | +62.8% |
| 2024 | +52.1% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 222,280 | 66,480 | 299,193 | ||
| D | 270,522 | 58,613 | 337,240 | ||
| D | 245,751 | 50,421 | 317,207 | ||
| D | 223,896 | 59,999 | 289,098 | ||
| D | 207,127 | 57,194 | 269,221 | ||
| D | 182,592 | 54,923 | 240,645 | ||
| D | 154,888 | 44,441 | 217,000 | ||
| D | 145,586 | 39,753 | 199,392 | ||
| D | 132,921 | 51,378 | 219,273 | ||
| D | 143,677 | 77,137 | 224,410 | ||
| D | 152,568 | 91,563 | 244,997 | ||
| D | 113,416 | 73,271 | 216,207 | ||
| D | 142,010 | 80,623 | 232,372 | ||
| D | 166,250 | 85,272 | 252,821 | ||
| D | 203,406 | 48,952 | 268,977 | ||
| D | 257,161 | 40,251 | 298,254 | ||
| D | 252,823 | 85,750 | 339,617 | ||
| D | 191,245 | 162,836 | 355,686 | ||
| D | 240,957 | 162,147 | 404,879 | ||
| D | 265,611 | 105,671 | 385,067 | ||
| D | 234,475 | 139,285 | 374,487 | ||
| D | 243,233 | 138,575 | 384,145 | ||
| D | 223,732 | 96,418 | 350,010 | ||
| D | 198,792 | 88,737 | 296,072 | ||
| D | 204,603 | 99,392 | 306,130 | ||
| R | 78,702 | 104,658 | 221,993 | ||
| R | 67,552 | 108,089 | 186,098 | ||
| D | 61,047 | 42,492 | 106,148 | ||
| D | 46,059 | 24,179 | 97,851 | ||
| R | 43,773 | 46,337 | 95,539 | ||
| D | 51,714 | 43,681 | 98,964 | ||
| D | 47,534 | 40,951 | 91,365 | ||
| R | 31,744 | 53,633 | 89,551 | ||
| D | 44,504 | 35,304 | 81,392 | ||
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Demographics
2024 ACS
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%
African American
14.6%
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.
2024 ACS
Age distribution by sex
Median age: 33.9 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.
2024 ACS
Median household income
Inflation-adjusted dollars
$95,631
Suffolk County ranks in the top 5% of US counties.
Suffolk County$95,631
Massachusetts$103,960
United States$80,734
Suffolk County ranks in the top 5% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
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.
2024 ACS
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.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 41.2% of residents not counted as adherents by any reporting body.
Suffolk County is among the most Democratic jurisdictions in the country, anchored by Boston's dense urban electorate and large student and immigrant populations that have produced presidential margins exceeding 50 points in recent cycles.
Suffolk County has leaned Democratic in recent presidential elections, reaching a Democratic margin of seventy-three points in 1964. Between 2020 and 2024 it moved eleven points toward the Republican candidate — part of the sharpest rightward shift recorded among any group of places in the country.
Its demographics describe the shift: a 46% non-Hispanic-white share, a median household income of $95,631, and a population of 785,121. The county's voting pattern over the last decade is most similar to that of Orleans Parish and Philadelphia County.
Most similar counties
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.
Suffolk County, Massachusetts. Akashic. https://akashic.app/county/25025/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More in Massachusetts
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Frequently asked questions
How did Suffolk County, Massachusetts vote in 2024?
In 2024, Suffolk County, Massachusetts voted Democratic by 52.1 points (D+52), carried by the Democratic candidate. Out of 299,193 votes cast, 222,280 went Democratic and 66,480 went Republican.
What is Suffolk County, Massachusetts's political typology?
Akashic places Suffolk County, Massachusetts in the "New American" typology — Communities where a large share of households speak a language other than English — multilingual, Democratic-leaning overall, yet the hardest-swinging bloc toward the Republican Party in 2024. 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 38 elections in the dataset, the county has voted Democratic 30 times, Republican 4 times, and other 0 times.
When did Suffolk County, Massachusetts last vote Republican?
The most recent presidential election in which Suffolk County, Massachusetts voted Republican was 1924.
How many people live in Suffolk County, Massachusetts?
Suffolk County, Massachusetts has a population of 785,121 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Suffolk County, Massachusetts?
Median household income in Suffolk County, Massachusetts is $95,631 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Suffolk County, Massachusetts?
Akashic tracks 38 presidential elections in Suffolk County, Massachusetts from 1876 to 2024. Of those, 30 went Democratic and 4 went Republican. The county's typology — "New American" — captures where that record, its demographics, and its recent swing place it among American communities.