Ildibad (sometimes rendered Ildebad, Ildebadus, Hildebad or Heldebadus) (died 541) was a king of the Ostrogothic Kingdom in AD 540–541.

[3] In AD 541 he was engaged outside the heavily defended city of Treviso by its military commander Vitalius and a sizable body of Herules.

[3] Herwig Wolfram suggests that this is an invention by Procopius to "personalize" the causes of political events, and that the real reason for Uraias' murder was that the Witiges clan had allied with non-Gothic barbarians, including the Rugii and probably Gepids, to conspire against Ildibad's rule.

[4][3] The lack of a suitable Gothic successor enabled the Rugians to make their chief Eraric king of the Goths.

[2] Eraric, however, betrayed the Goths and secretly offered to surrender the Gothic kingdom to the Byzantines in return for money.