what year defines a millennial
Millennials have surpassed Baby Boomers as the nationâs largest living generation, according to population estimates released this month by the U.S. Census Bureau. Millennials, whom we define as those ages 18-34 in 2015, now number 75.4 million, surpassing the 74.9 million Baby Boomers (ages 51-69). And Generation X (ages 35-50 in 2015) is projected to pass the Boomers in population by 2028. The Millennial generation continues to grow as young immigrants expand its ranks.