However, Lewington is now set for pastures new, as he seeks the next challenge in his career.
Chairman Steve Parish said: Ray holds a prominent place in the heart of every Crystal Palace supporter, and I would like to thank him for his tremendous service.
As well as his superb coaching, we will all miss Ray's infectious positivity, patience and enthusiasm all of which he displayed every matchday from the sidelines!
We would like to wish Ray all the very best for the future he knows that he will always be welcome back at Selhurst Park."
Lewington added: I have thoroughly enjoyed my time at the club, I am very grateful to all the staff and players I have worked with over several seasons.
I have enjoyed every minute of my time here and I wish the club the very best of luck for the rest of this season, and beyond."