Diocletianopolis or Diokletianoupolis () may refer to a number of places in the ancient world named after Emperor Diocletian.
Diocletianopolis (Palestine), in modern Israel Diocletianopolis (Thebais), in modern Egypt Diocletianopolis (Thrace), in modern Bulgaria Diocletianopolis (Kastoria) in Greece Diocletianopolis (Pella) in Greece
See also Dioclea (disambiguation) Doclea (disambiguation)