We estimate that 50% of young people, ages 18-29, voted in the 2020 presidential election, a remarkable 11-point increase from 2016 (39%) and likely one of the highest rates of youth electoral participation since the voting age was lowered to 18. Our new estimate is based on newly available voter file data in 41 states—AK, DC, HI, MD, MS, NH, ND, UT, WI, WY do not have reliable vote history data by age.