Thế hệ 9X (literally "9X Generation", often referred to simply as 9X) is a Vietnamese term for people born during the 1990s.^[1] The usage of 9X was used to refer to both Vietnamese people^[2] and people of varying Asian cultures born during the 1990s.^[3][4] The 9X generation of Vietnam refers to those that grew up during the development of Vietnam's economy, information technology, and other influential events that opened Vietnam to the world.

They were described as being a progressive and rebellious generation.^[2] They are often described as being more confident than members of older generations, they dare to freely pursue personal interests, and are more proficient in foreign languages. Technology, specifically the internet, is an important part of their lives. They are also willing to reject established traditions, ignore elder class values, listen to classical music, and follow foreign fashion trends and life styles.^[2]

This generation has now become matured citizens of Vietnam and is subsequently succeeded by the 2K Generation, a phrase that is used to refers "kids" that were born from the year of 2000 to 2009. This phrase was later popularly outshone by the term "Gene Z" which has a very close definition to the "2K."