The 28-year-old Ghanaian international scored nine goals and provided two assists from 37 appearances as Crystal Palace finished 14th on the Premier League table.
Ayew held off competition from goalkeeper Vicente Guaita and Gary Cahill to claim 37 percent of the total votes cast by 6,000 Palace supporters.
The former Aston Villa and Swansea City striker also won Crystal Palace’s goal of the season award for his superb individual effort against West Ham United back in December and the players’ player of the season.
Ayew paid tribute to the late president of former club Olympique Marseille, Pape Diouf, who died in March after contracting coronavirus, in his acceptance speech.
“I’ve worked so hard to get into the team and I think the first season I came into this team wasn’t the best but the club had faith in me, the club wanted me to stay and I wanted to stay as well,” Ayew was quoted by the club website.
"I had the desire to have a better season and things have gone so well. I’m just grateful.
"I want to thank everyone at the football club; I want to thank the fans especially, they’ve been massive for us this season, for me especially they’ve been massive. I’d like to thank all the people that supported me within the difficult moments that I had in my football career.
"When I have this type of award I just think of my family and obviously of the fans. And one man that’s been so influential in my football career: that’s [mentor and former Olympique de Marseille president] Pape Diouf. I lost him within the period of COVID and he passed away, I wish he was still here so I could present him this."
