Janis (surname)
Janis or Janiš is a surname. Notable people with the surname include:
- Byron Janis, American concert pianist
- Conrad Janis, American actor and jazz musician
- Dorothy Janis, American silent film actress
- Elsie Janis, American musical theatre and vaudeville performer
- Irving Janis, social psychologist who pioneered the groupthink theory
- Jaroslav Janiš, Czech auto racing driver
- Josef Antonín Janiš, Czech priest and apiculturist
- Linzie Janis, American television journalist
- Sidney Janis,, American art dealer, collector, and writer