Ubaydallah ibn al-Sari () (akafa 865) aiva gavhuna weEgypt kubva muna 822 kusvika muna 826. Mwanakomana waal-Sari ibn al-Hakam, aive wechitatu uye wekupedzisira wemhuri yake kutonga akazvimiririra pamusoro pezvikamu zveEjipitori panguva yakaoma nguva yakatevera hondo huru yevagari vemuAbbasid
, uye kuzvipira kwake kuna Abdallah ibn Tahir muna 826 kwakaratidza kudzoreredzwa kwekutonga kwakasimba kweAbbasid mudunhu kekutanga kubva pakatanga kupokana.