Key Biscayne is a city located in Florida. With a 2020 population of 13,307, it is the 149th largest city in Florida and the 2516th largest city in the United States. Key Biscayne is currently growing at a rate of 0.60% annually and its population has increased by 7.80% since the most recent census, which recorded a population of 12,344 in 2010. Spanning over 2 miles, Key Biscayne has a population density of 10,669 people per square mile.
The average household income in Key Biscayne is $230,319 with a poverty rate of 4.66%. The median rental costs in recent years comes to $2,448 per month, and the median house value is $1.22 Mn. The median age in Key Biscayne is 42 years, 41.3 years for males, and 43.3 years for females. For every 100 females there are 90.7 males.