Without an influx of international migration to the Pittsburgh metro area, the region would have lost 36,580 residents since 2010. This would have been far and away the largest population decline of any large U.S. metro area over that time span. Luckily, enough people came across borders to the Steel City, drastically cutting into the figure, and stemming some the region’s population decline. (The Pittsburgh region has still lost 14,000 residents since 2010, the second most of major metro areas, behind Cleveland.)
According to U.S. Census figures, from 2010 to 2016, the Pittsburgh area gained 22,588 residents from international migration, which is defined as migration by the foreign-born, Puerto Ricans and native-born Americans living overseas.
Read the full article from PGH City Paper: Immigrants are propping up the Pittsburgh metro area population
Read the report from New American Economy: Immigration and the Revival of American Cities