Ioannites, Johannites or Johanniter may refer to:
- Ioannite sect of Russian Orthodox Church
- another name for Knights Hospitaller
- (members of the) Order of Saint John (disambiguation)
- Order of Saint John (chartered 1888)
- Order of Saint John (Bailiwick of Brandenburg)
- Johanniter International
- Johanniter-Unfall-Hilfe, humanitarian organization for emergency health care
- St John Ambulance
- Citizens of Ioannina
- Johannite Church
- Johanniter (grapes) , Czech grape variety