The Giudicato of Agugliastra or Ogliastra was a small and short-lived giudicato in Sardinia probably in the tenth and eleventh centuries. It lay south of Gallura, east of Arborea, and north of Cagliari along the Tyrrhenian Sea on the east of the island. Its capital was Ogliastra.
Agugliastra is the only one of the several small giudicati known from the Dark Ages. It was annexed by Cagliari early on and thereafter there remained only four giudicati on Sardinia.