Ioannidis or Ioannides (Greek: Ιωαννίδης) is a Greek surname.
The female version of the name is Ioannidou or Ioannides.
Ioannidis or Ioannides is a patronymic surname which literally means "the son of Ioannis (Yiannis)", thus making it equivalent to English Johnson.
Notable people with surname Ioannidis or Ioannides include: