Getting to know Catano will be a piece of cake once you're sitting in your rental car. But before you land in a new place, it's always handy to know a little basic info about the area.You'll discover a world of cultures and customs on your travels through Puerto Rico, Catano is no exception.It can be useful to know how many people live in the place you're road tripping to. In this area of San Juan, the population is around 28,100.