Jānis Bērziņš is a Latvian given name (Jānis) and surname (Bērziņš) which may refer to:
Jānis Bērziņš (politician) (, 1889–1938), Soviet military official and politician Jānis Bērziņš (diplomat) (1881–1938), Soviet diplomat Jānis Bērziņš (basketball) (born 1993), Latvian basketball player Jānis Bērziņš (biathlete) (born 1984), Latvian Olympic biathlete