All But One Puerto Rico County Lost Population
All but one county in Puerto Rico lost population during 2010 to 2015, further entrenching population declines that began at lower levels at the start of the century.
According to a Pew Research Center analysis of newly released county-level Census Bureau data, Gurabo, located in eastern Puerto Rico, was the only county, or "municipio," that saw a population increase.
The county with the largest decrease was San Juan, where the island's capital and largest metro area are located. There, the population fell by 40,000 people to 355,000. Nine other counties saw their populations decline by at least 10 percent during those years.