Southeastern Connecticut Planning Region, Connecticut: Diversifying Metro county. In 2024, voted D+11%. Republican peak: R+41 in 1896.
Key facts
- 2024 presidential margin
- D+11MIT Election Lab
- Political typology
- Diversifying MetroAkashic typology
- Population
- 279,9712024 5-year
- Median household income
- $86,5862024 5-year
- White (non-Hispanic)
- 74.1%2024 5-year
- Black
- 5.4%2024 5-year
- Hispanic / Latino
- 15.0%2024 5-year
- Peak Democratic margin
- D+39 in 1964MIT Election Lab
- Peak Republican margin
- R+41 in 1896MIT Election Lab
- Most similar
- Lower Connecticut River Valley Planning Region, CT · similarity 0.99
2024 results by precinct
2024 precinct map of Southeastern Connecticut Planning RegionPrecinct-level 2024 presidential results for Southeastern Connecticut Planning Region, 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 | −6.1% |
| 1880 | −9.7% |
| 1884 | −7.1% |
| 1888 | −2.1% |
| 1892 | No data |
| 1896 | −41.0% |
| 1900 | −17.9% |
| 1904 | −19.2% |
| 1908 | −20.9% |
| 1912 | +7.8% |
| 1916 | −0.3% |
| 1920 | −29.4% |
| 1924 | −32.0% |
| 1928 | −12.3% |
| 1932 | +0.3% |
| 1936 | +7.3% |
| 1940 | +9.6% |
| 1944 | +9.7% |
| 1948 | +3.7% |
| 1952 | −9.5% |
| 1956 | −22.5% |
| 1960 | +4.2% |
| 1964 | +39.0% |
| 1968 | +6.0% |
| 1972 | −26.5% |
| 1976 | −0.7% |
| 1980 | −10.6% |
| 1984 | −23.7% |
| 1988 | −3.6% |
| 1992 | +12.7% |
| 1996 | +20.7% |
| 2000 | +17.6% |
| 2004 | +13.0% |
| 2008 | +20.5% |
| 2012 | +17.9% |
| 2016 | +5.5% |
| 2020 | +14.4% |
| 2024 | +10.7% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 77,832 | 62,524 | 142,880 | ||
| D | 81,287 | 60,490 | 144,926 | ||
| D | 63,890 | 56,876 | 128,303 | ||
| D | 69,393 | 48,066 | 119,392 | ||
| D | 77,232 | 50,627 | 129,590 | ||
| D | 68,262 | 52,231 | 122,969 | ||
| D | 62,610 | 42,712 | 113,170 | ||
| D | 56,418 | 34,242 | 107,148 | ||
| D | 51,552 | 36,057 | 122,347 | ||
| R | 50,749 | 54,633 | 106,719 | ||
| R | 40,227 | 65,342 | 106,093 | ||
| R | 38,122 | 48,923 | 102,028 | ||
| R | 47,992 | 48,685 | 97,281 | ||
| R | 34,812 | 60,268 | 95,995 | ||
| D | 43,531 | 38,320 | 86,865 | ||
| D | 57,240 | 25,135 | 82,426 | ||
| D | 42,900 | 39,441 | 82,342 | ||
| R | 28,854 | 45,579 | 74,433 | ||
| R | 33,132 | 40,097 | 73,386 | ||
| D | 31,253 | 28,977 | 61,226 | ||
| D | 31,024 | 25,522 | 56,839 | ||
| D | 30,075 | 24,803 | 54,981 | ||
| D | 26,447 | 22,749 | 50,648 | ||
| D | 20,903 | 20,776 | 42,540 | ||
| R | 17,498 | 22,463 | 40,253 | ||
| R | 9,349 | 19,324 | 31,138 | ||
| R | 9,831 | 18,392 | 29,113 | ||
| R | 8,721 | 8,780 | 17,981 | ||
| D | 7,215 | 5,917 | 16,554 | ||
| R | 6,787 | 10,506 | 17,764 | ||
| R | 7,349 | 10,924 | 18,658 | ||
| R | 7,036 | 10,162 | 17,497 | ||
| R | 3,412 | 8,745 | 13,019 | ||
| — | — | — | — | ||
| R | 7,889 | 8,236 | 16,728 | ||
| R | 6,861 | 7,908 | 14,769 | ||
| R | 6,982 | 8,484 | 15,465 | ||
| R | 6,961 | 7,861 | 14,822 |
Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
14.7%
Italian
13.5%
English
12.3%
German
9.7%
Polish
6.5%
French
6.2%
American
3.1%
African American
4.3%
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: 41.1 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
$86,586
Southeastern Connecticut Planning Region ranks in the top 10% of US counties.
Southeastern Connecticut Planning Region$86,586
Connecticut$95,781
United States$80,734
Southeastern Connecticut Planning Region ranks in the top 10% 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
10.7%
Children face moderate poverty.
Children under 1815.1%
Working age (18–64)9.8%
Seniors (65+)6.9%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
84.7%
speak English only
Spanish9.4%
Other Indo-European3.4%
Asian & Pacific Islander2.1%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 60.6% of residents not counted as adherents by any reporting body.
Southeastern Connecticut Planning Region sits in New England. A mid-size metropolitan county growing steadily more diverse, it has trended toward the Democratic party over recent cycles.
The Democratic margin here reached thirty-nine points in 1964. Between 2020 and 2024 the county moved four points toward the Republican candidate; the 2024 margin was eleven points.
A population of 279,971, a 74% non-Hispanic-white share, and a median household income of $86,586 describe the county. The county's voting pattern over the last decade is most similar to that of Lower Connecticut River Valley Planning Region and Naugatuck Valley Planning Region.
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.
Southeastern Connecticut Planning Region, Connecticut. Akashic. https://akashic.app/county/09180/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More in Connecticut
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Frequently asked questions
How did Southeastern Connecticut Planning Region, Connecticut vote in 2024?
In 2024, Southeastern Connecticut Planning Region, Connecticut voted Democratic by 10.7 points (D+11), carried by the Democratic candidate. Out of 142,880 votes cast, 77,832 went Democratic and 62,524 went Republican.
What is Southeastern Connecticut Planning Region, Connecticut's political typology?
Akashic places Southeastern Connecticut Planning Region, Connecticut in the "Diversifying Metro" typology — Mid-size metropolitan counties growing more diverse and trending Democratic. 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 18 times, Republican 19 times, and other 0 times.
When did Southeastern Connecticut Planning Region, Connecticut last vote Republican?
The most recent presidential election in which Southeastern Connecticut Planning Region, Connecticut voted Republican was 1988.
How many people live in Southeastern Connecticut Planning Region, Connecticut?
Southeastern Connecticut Planning Region, Connecticut has a population of 279,971 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Southeastern Connecticut Planning Region, Connecticut?
Median household income in Southeastern Connecticut Planning Region, Connecticut is $86,586 — above the national median of $80,734. The Connecticut state median is $95,781.
What is the political history of Southeastern Connecticut Planning Region, Connecticut?
Akashic tracks 38 presidential elections in Southeastern Connecticut Planning Region, Connecticut from 1876 to 2024. Of those, 18 went Democratic and 19 went Republican. The county's typology — "Diversifying Metro" — captures where that record, its demographics, and its recent swing place it among American communities.