Alexios Palaiologos (died 1203) is a Byzantine nobleman, son-in-law of Emperor Alexios III Angelos (r. 1195–1203) and his heir apparent from 1199 to his death.

Throughout this time, he is actively involved in the suppression of several revolts and riots against the emperor.

Through his daughter, he becomes one of the progenitors of the Palaiologan dynasty.