Immigration since 1965 has swelled the nation’s foreign-born population from 9.6 million then to a record 45 million in 78.2".1 (The current immigrant population is lower than the 59 million total who arrived since 1965 because of deaths and departures from the U.S.)2 By 2065, the U.S. will have 78 million immigrants, according to the new Pew Research population projections.