Groton, Connecticut Demographics & Population 2026
During the 2020–2024 ACS period, Groton, Connecticut had a total population of 9,490, the 38th largest city in Connecticut, with a median household income of $79,577, which is 17% lower than the state average. The poverty rate is 18.6%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Groton Quick Facts
How Groton Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 9,343 | 9,490 | +1.6% |
| Median household income | $69,811 | $79,577 | +14.0% |
| Median home value | $278,900 | $306,600 | +9.9% |
How Groton Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 57 | National average: 61
Education
Educational Attainment (Adults 25+)
Groton Rankings in Connecticut
Explore Connecticut Rankings
Cities Similar to Groton
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Oakville | 9,276 | $95,515 | $280,500 | 30.8% | 2.4% |
| Conning Towers-Nautilus Park | 8,460 | $81,694 | $290,100 | 30.3% | 7.1% |
| New Milford | 8,188 | $83,235 | $331,900 | 34.7% | 8.3% |
| Kensington | 9,962 | $109,447 | $330,400 | 40.6% | 3.2% |
| Thompsonville | 7,927 | $71,805 | $241,600 | 24.3% | 18.7% |
Population Overview
Groton is a small city located in Connecticut. The total population is 9,490. It ranks as the 38th most populous out of 214 Census-designated places in Connecticut.
Age Demographics
The median age in Groton is 39.0 years. This is 5% lower than the state median of 41.1 years.
Economy, Income & Housing
The median household income in Groton is $79,577. This is 17% lower than the state median of $95,781. It is also 1% lower than the national median of $80,734. The poverty rate stands at 18.6%. This is 86% higher than the state poverty rate of 10.0%. The unemployment rate is 6.0%. This is 8% higher than the state rate of 5.6%. The median home value is $306,600. Housing costs are 16% lower than the state median of $366,900. The home-value-to-income ratio is 3.9x. 45.4% of occupied housing units are owner-occupied. This homeownership rate is 32% lower than the state average of 66.5%.
Race & Ethnicity
The largest racial or ethnic group in Groton is White (non-Hispanic), making up 67.0% of the population. Hispanic or Latino residents account for 12.4%.
Education
38.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 9% lower than the state rate of 42.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 94.1%.
Data Sources & Methodology
All demographic data for Groton, Connecticut is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Connecticut state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 214 Census-designated places in Connecticut. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Groton, Connecticut?
Groton, Connecticut has a population of 9,490 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Groton, CT?
The median household income in Groton is $79,577, which is 1% lower than the national median of $80,734.
What is the poverty rate in Groton, CT?
The poverty rate in Groton is 18.6%. This means approximately 1,764 residents live below the federal poverty line.
What is the racial makeup of Groton, Connecticut?
Groton's population is 67.0% White, 8.0% Black, 12.4% Hispanic/Latino, and 6.0% Asian.
What is the median home value in Groton, CT?
The median home value in Groton is $306,600. The home-value-to-income ratio is 3.9x.
How educated is Groton, Connecticut?
38.8% of adults (25+) in Groton hold a bachelor's degree or higher, and 12.7% hold a graduate or professional degree.