Ala ud-din Sikandar Shah (Persian: علاء الدین سکندر شاه, born Humayun Khan; Persian: همایون خان), was the son of Sultan Muhammad Shah Tughluq.
He ascended the imperial throne in virtue of his being heir apparent, as Ala-ud-din Sikandar Shah on 1 February 1394 C.E.
He was a pious and devout king who never missed his namaz prayers but after one month and sixteen days he died of natural causes.