This was by far the widest gap in support among college graduates and non-college graduates in exit polls dating back to 1980. Millennials overtake Baby Boomers as America’s largest generation Millennials surpassed Baby Boomers as the nation’s largest living generation, according to our spring analysis of U. And Generation X (ages 35 to 50 in 2015) is projected to pass the Boomers in population by 2028.