Dioclea or Dioklea, Dioclia or Dioklia, Diocleia or Diokleia (), was a town of ancient Phrygia, inhabited during Roman and Byzantine times.
In Hellenic times it had a mint, under its king Elagabalus.
It was the see of a Christian bishop. Lequien, names only two known bishops of the town. Constantius (fl 431 - 451) and Evander No longer the seat of a residential bishop, it remains a titular see of the Roman Catholic Church as well as the Eastern Orthodox Church (for which it is now a metropolitan titular see, with Kallistos Ware as its metropolitan until his death in August 2022).
Its site is located near Yeşilhisar in Asiatic Turkey.