Mamanasco Lake, Connecticut Demographics & Population 2026

A note before these figures: with a population of 499, Mamanasco Lake'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

Mamanasco Lake is a small community located in Connecticut. The total population is 499. It ranks as the 184th most populous out of 214 Census-designated places in Connecticut.

Age Demographics

The median age in Mamanasco Lake is 40.8 years. This is about the same as the state median of 41.1 years.

Economy, Income & Housing

The median household income in Mamanasco Lake is $221,250. This is 131% higher than the state median of $95,781. It is also 174% higher than the national median of $80,734. The poverty rate stands at 1.0%. This is 90% lower than the state poverty rate of 10.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 0.4%. This is 93% lower than the state rate of 5.6%. The median home value is $940,800. Housing costs are 156% higher than the state median of $366,900. The home-value-to-income ratio is 4.3x. 82.1% of occupied housing units are owner-occupied. This homeownership rate is 24% higher than the state average of 66.5%.

Race & Ethnicity

Mamanasco Lake has a predominantly White (non-Hispanic) population, comprising 99.0% of all residents. Asian residents account for 0.6%. The White (non-Hispanic) population is significantly higher than the state average (99.0% vs 61.9%). The Black or African American population (0.4%) is well below the state average of 9.8%. The Asian population (0.6%) is well below the state average of 4.8%.

Education

88.1% of residents aged 25 and older hold a bachelor's degree or higher. This places Mamanasco Lake in the top 10% of all cities in the state for educational attainment. This is 107% 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 95.8%. Notably, 30.8% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Mamanasco Lake, 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.