Stonington, Connecticut Demographics & Population 2026

A note before these figures: with a population of 934, Stonington's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Stonington is a small community located in Connecticut. The total population is 934. It ranks as the 165th most populous out of 214 Census-designated places in Connecticut.

Age Demographics

The median age in Stonington is 63.1 years. This is 54% higher than the state median of 41.1 years. Only 10.9% of residents are under 18, indicating fewer families with children. 18.9% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Stonington is $109,167. This is 14% higher than the state median of $95,781. It is also 35% higher than the national median of $80,734. The poverty rate stands at 5.1%. This is 49% lower than the state poverty rate of 10.0%. The unemployment rate is 5.4%. This is 4% lower than the state rate of 5.6%. The median home value is $879,800. Housing costs are 140% higher than the state median of $366,900. The home-value-to-income ratio of 8.1x suggests that housing affordability is a significant concern for many residents. 61.9% of occupied housing units are owner-occupied. This homeownership rate is 7% lower than the state average of 66.5%.

Race & Ethnicity

Stonington has a predominantly White (non-Hispanic) population, comprising 87.5% of all residents. Hispanic or Latino residents account for 8.6%. The Hispanic or Latino population (8.6%) is well below the state average of 18.3%. The Asian population (0.9%) is well below the state average of 4.8%.

Education

76.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 79% higher 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 99.5%. Notably, 43.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Stonington, 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.