The 28-year-old has scored 25 goals since Brendan Rodgers made him one of his first signings as Celtic manager, the latest the penalty opener in their record-breaking 5-1 victory over Rangers at Ibrox.
After receiving the fans’ award, Sinclair said: “It means so much. The thing is I have been to so many clubs, so many, and here I feel like I’ve found a home.
“And also to have the connection back with the fans, playing week in, week out, and to be scoring goals, I have amazing team-mates, I can’t thank them enough.
“And also a big thank-you to Brendan Rodgers. The past two to three years has been tough – being at City and not playing for two years, and being at Villa and getting relegated.
“I was sort of at a crossroads in my career where I didn’t really know where to turn. Now I don’t look back. For him, to put me back on that platform, doing what I do best, and getting me back to scoring goals and back to enjoying football again.”
Kieran Tierney won the young player award, while Moussa Dembele got the best goal for his third strike at St Johnstone in February, which came after a 24-pass move.