Since 2016, Millennials have been the largest generation in the U.S. labor force at over 56 million. As of 2019, millennials have surpassed Baby Boomers as the nation’s largest living adult generation according to the U.S. Census Bureau’s population estimated form. The U.S. Census Bureau. The millennial force is still growing with a projection peak of 75 million in 2033 according to the Census Bureau. Gen Z is now the fastest growing generation in the workforce now being up to age 26.