
Key Colony Beach
- County:
- Monroe County
- County Seat:
- No
- Area (mi²):
- 0.44
- State:
- Florida
Key Colony Beach is a city located in Monroe County, Florida. Key Colony Beach has a 2025 population of 735. Key Colony Beach is currently declining at a rate of -1.34% annually and its population has decreased by -6.61% since the most recent census, which recorded a population of 787 in 2020.
The average household income in Key Colony Beach is $110,260 with a poverty rate of 5.14%. The median age in Key Colony Beach is 66.1 years: 65.8 years for males, and 67.4 years for females.