Pew Research Center broke down population estimates released this month by the U.S. Census Bureau finding there are now 75.4 million living millennials, a half-million more than the 74.9 million living baby boomers The number of millennials is rising partly due to an influx of young immigrants, according to Pew The generation’s population is anticipated to peak in 2036 with 81.1 million living members, when the oldest millennial is 56