As of the 2000 census the population was 79,535 , with an average density of , although much of the population is concentrated in a few areas of much higher density , such as the city of Key West , which has 32 % of the entire population of the Keys .
As of the 2000 census the population was 79,535 , with an average density of 223.66 / km ² ( 579.27 / sq mi ) , although much of the population is concentrated in a few areas of much higher density , such as the city of Key West , which has 32 % of the entire population of the Keys .