Millennials, also known as Generation Y or Gen Y, are the demographic cohort following Generation X and preceding Generation Z. Researchers and popular media use the early 1980s as starting birth years and the mid-1990s to early 2000s as ending birth years, with the generation typically being defined as people born from 1981 to 1996.[1] Most millennials are the children of baby boomers and early Gen Xers;[2] Millennials are often the parents of Generation Alpha.[3]

Across the globe, young people have postponed marriage.[4] Millennials were born at a time of declining fertility rates around the world,[5] and are having fewer children than their predecessors.[6][7][8][9] Those in developing nations will continue to constitute the bulk of global population growth.[10] In the developed world, young people of the 2010s were less inclined to have sexual intercourse compared to their predecessors when they were at the same age.[11] In the West, they are less likely to be religious than their predecessors,[5][12] but they may identify as spiritual.[13]

Millennials have been described as the first global generation and the first generation that grew up in the Internet age.[14] The generation is generally marked by elevated usage of and familiarity with the Internet, mobile devices, and social media,[15] which is why they are sometimes termed digital natives.[16] Between the 1990s and the 2010s, people from the developing world became increasingly well educated, a factor that boosted economic growth in these countries.[17] Millennials across the world have suffered significant economic disruption since starting their working lives; many faced high levels of youth unemployment during their early years in the labour market in the wake of the Great Recession, and suffered another recession a decade later due to the COVID-19 pandemic.[18][19]