Key Colony Beach, Florida Demographics & Population 2026

A note before these figures: with a population of 511, Key Colony Beach'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

Key Colony Beach is a small community located in Florida, within Monroe County. The total population is 511. It ranks as the 853rd most populous out of 955 Census-designated places in Florida.

Age Demographics

The median age in Key Colony Beach is 66.5 years. This is 56% higher than the state median of 42.6 years. Only 3.1% of residents are under 18, indicating fewer families with children. 30.7% 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 Key Colony Beach is $94,231. This is 26% higher than the state median of $74,568. It is also 17% higher than the national median of $80,734. The poverty rate stands at 8.2%. This is 35% lower than the state poverty rate of 12.6%. The survey records no unemployed residents in Key Colony Beach, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $919,800. Housing costs are 156% higher than the state median of $359,000. The home-value-to-income ratio of 9.8x suggests that housing affordability is a significant concern for many residents. 68.1% of occupied housing units are owner-occupied.

Race & Ethnicity

Key Colony Beach has a predominantly White (non-Hispanic) population, comprising 90.6% of all residents. Hispanic or Latino residents account for 9.4%. The White (non-Hispanic) population is significantly higher than the state average (90.6% vs 50.4%). The Hispanic or Latino population (9.4%) is well below the state average of 27.4%.

Education

43.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 28% 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 97.4%.

Data Sources & Methodology

All demographic data for Key Colony Beach, 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.