Here are the birth years for each generation: 1  Gen Z, iGen, or Centennials: Born 1996 and later. 2  Millennials or Gen Y: Born 1977 to 1995. 3  Generation X: Born 1965 to 1976.  Baby Boomers: Born 1946 to 1  1964. Traditionalists or Silent Generation: Born 1945 and before.