Millennials are people born between 1981 and 1996, which means they are currently between 25 and 40 years old in 2023. The Pew Research Center defines millennials as people born between 1981 and 1996, choosing these dates for "key political, economic and social factors," including the September 11 terrorist attacks, the 2003 invasion of Iraq, the Great Recession, and the Internet explosion. However, different sources may vary by a year or two in defining the generation.