The 38-year-old is currently running for the presidency of the Spanish Football Federation (RFEF), where he will come up against current incumbent Luis Rubiales, but he would like to return to his former club at some point in the future.
"Return to Real Madrid in a different role? Of course I would like to return," Casillas told Spanish YouTube star DjMariio, with the video being uploaded on Post United's channel as well.
"It is my home, even if I have been away for five years.
"I was there for 25 years; the link is palpable.
"I am convinced that one day I will have a close connection with Real Madrid again."