Ildibad (or Heldebadus) (d. 541) was a king of the Ostrogoths in Italy, being chosen to replace Witiges, who had been engaged in complicated schemes with Belisarius and had left Ravenna. Ildibald reigned for only about a year before being killed by a Gepid at a palace banquet, and was succeeded by his nephew Totila.

Ildibad was actually a Visigoth, a nephew of one of the Visigothic kings in Spain.