Live births by year are published by the National Vital Statistics System of the National Center for Health Statistics. Population sizes for 2020 to 2050 are based on Census Bureau population projections released in 2017 (and also available by single year of age). Population figures for 2019 and earlier years are based on Census Bureau population estimates (2019 vintage and available by single year of age). births following World War II – are aging and their numbers shrinking in size as the number of deaths among them exceeds the number of older immigrants arriving in the country. Boomers – whose generation was defined by the boom in U.S. The Millennial generation continues to grow as young immigrants expand its ranks. Generation X (ages 39 to 54) numbered 65.2 million and is projected to pass the Boomers in population by 2028. As of J(the latest date for which population estimates are available), Millennials, whom we define as ages 23 to 38 in 2019, numbered 72.1 million, and Boomers (ages 55 to 73) numbered 71.6 million. Millennials have surpassed Baby Boomers as the nation’s largest living adult generation, according to population estimates from the U.S. Learn more about how we currently report on generations, and read tips for consuming generations research. Our approach to generational analysis has evolved to incorporate new considerations.

Millennial generation age range