How many people live in Southeastern Connecticut Planning Region, CT?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 282,600 people living in Southeastern Connecticut Planning Region, CT. That makes Southeastern Connecticut Planning Region the sixth-most populous planning region in Connecticut. It is home to 7.7% of people living in the state.
283K
population of Southeastern Connecticut Planning Region, CT (2024)
7.7%
County share of the Connecticut population (2024)
About 282,600 people lived in Southeastern Connecticut Planning Region, CT in 2024.
Population estimates, 2020–2024
What are Southeastern Connecticut Planning Region, CT’s age demographics?
About 58,400 Southeastern Connecticut Planning Region, CT residents are aged 65 and older in 2024. That represents 20.7% of its population. For comparison, the age group represents 19.5% of Connecticut’s population and 18% in the US overall.
Another 53,000 Southeastern Connecticut Planning Region residents, or 18.7% of the population, were children under 18. For comparison, the age group represents 19.8% of Connecticut’s population and 21.6% in the US overall.
A lower share of Southeastern Connecticut Planning Region, CT's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Southeastern Connecticut Planning Region, CT’s racial and ethnic demographics?
Non-Hispanic white residents make up 70.9% of the Southeastern Connecticut Planning Region population, higher than the national share of 57.5%. Southeastern Connecticut Planning Region also has a larger share of people identifying as non-Hispanic two or more races (3.1%) than the US overall (2.5%).
In contrast, Southeastern Connecticut Planning Region’s non-Hispanic Black or African American population accounts for 5.6%, below the 12.6% nationwide, and the Hispanic population makes up 15.7% of the region, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Southeastern Connecticut Planning Region, CT has a higher share of a non-Hispanic white population than Connecticut as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Southeastern Connecticut Planning Region, CT is Norwich with about 40,000 residents in 2024.
Cities and towns in Southeastern Connecticut Planning Region, CT ranked by population
Population (2024), includes only portions within planning region
| City or town | Population | |
|---|---|---|
| 1. | Norwich | 39,993 |
| 2. | New London | 28,081 |
| 3. | Windham | 24,105 |
| 4. | Waterford | 19,910 |
| 5. | East Lyme | 19,004 |
| 6. | Montville | 17,913 |
| 7. | Colchester | 15,752 |
| 8. | Ledyard | 15,575 |
| 9. | Groton | 10,160 |
| 10. | Lebanon | 7,141 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
