Groton city, Connecticut Demographics & Population 2026

Population Overview

Groton city is a small city located in Connecticut. The total population is 9,343. It ranks as the 38th most populous out of 215 cities and towns in Connecticut.

Age Demographics

The median age in Groton city is 38.6 years. This is 6% lower than the state median of 41.2 years.

Economy, Income & Housing

The median household income in Groton city is $69,811. This is 26% lower than the state median of $93,760. Compared to the national median of $78,538, household income here is 11% lower. The poverty rate stands at 19.5%. This is 94% higher than the state poverty rate of 10.0%. The unemployment rate is 6.4%. This is 13% higher than the state rate of 5.7%. The median home value is $278,900. Housing costs are 19% lower than the state median of $343,200. The home-value-to-income ratio is 4.0x. 41.3% of occupied housing units are owner-occupied. This homeownership rate is 38% lower than the state average of 66.2%.

Race & Ethnicity

The largest racial or ethnic group in Groton city is White (non-Hispanic), making up 62.2% of the population. Hispanic or Latino residents account for 16.0%.

Education

34.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 17% lower than the state rate of 41.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.3%.

Data Sources & Methodology

All demographic data for Groton city, Connecticut is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Connecticut state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 215 Census-designated places in Connecticut. For official data, visit data.census.gov.