Duck Key, Florida Demographics & Population 2026

A note before these figures: with a population of 647, Duck Key'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

Duck Key is a small community located in Florida, within Monroe County. The total population is 647. It ranks as the 832nd most populous out of 955 Census-designated places in Florida.

Age Demographics

The median age in Duck Key is 64.3 years. This is 51% higher than the state median of 42.6 years. Only 4.5% of residents are under 18, indicating fewer families with children. 25.7% 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 Duck Key is $156,719. This is 110% higher than the state median of $74,568. It is also 94% higher than the national median of $80,734. The poverty rate stands at 13.0%. This is 3% higher than the state poverty rate of 12.6%. The unemployment rate is 7.7%. This is 59% higher than the state rate of 4.8%. The median home value is $1,051,000. Housing costs are 193% higher than the state median of $359,000. The home-value-to-income ratio of 6.7x suggests that housing affordability is a significant concern for many residents. 80.0% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 67.6%.

Race & Ethnicity

The largest racial or ethnic group in Duck Key is White (non-Hispanic), making up 81.3% of the population. Black or African American residents account for 10.4%. The White (non-Hispanic) population is significantly higher than the state average (81.3% vs 50.4%). The Hispanic or Latino population (5.7%) is well below the state average of 27.4%. The Asian population (1.4%) is well below the state average of 2.9%.

Education

49.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% higher than the state rate of 34.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.5%. Notably, 29.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Duck Key, Florida 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 Florida state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 955 Census-designated places in Florida. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.