Population density refers to the number of people living in a given area. It tells us how crowded or how spread out the population is in a particular place. Full definition
The risk to coastal areas is high because of the high population density in the area — some 130 million people live along the sea's coastline. (sciencedaily.com)
It also has the lowest population density in the region — only 15 residents per square km. (lashworldtour.com)
In response, the community has decided to control population density in the area through limits on coastal construction. (aaas.org)