According to data shared by Statista, in 2020, there were 72.26 million millennials in the United States. It works out to more or less 22% of the US population. In short, millennials are regarded as anyone born between 1981 and 1996. Till recently, baby boomers (those born between 1946 and 1964) were the largest generation group. Though, in the past decade, their numbers have decreased by almost 6 million.