Manoa - fresh from his man of the match performance in the Aviva Premiership semi-final win over Saracens - picked up both the Players' Player and Supporters' Player of the Season awards, receiving standing ovations on both occasions.
The 28-year-old American has played in all-bar-one of the Saints' first team fixtures this season, and his performances have earned him plaudits from all corners as well as a selection in the star-studded Barbarians squad which will face the British and Irish Lions in Hong Kong.
"It means a lot to me," he told SaintsTV. "It's a blessing and I'd like to thank the supporters who voted for me, and the players, too. Without them I wouldn't be able to play like this.
"I've wanted to up my game a little bit more from last year, especially in defence, and I'm still learning the sport. There's plenty more to come from me!"
As well as picking up the awards, Manoa also received his club cap from chairman Leon Barwell after passing the 50-appearance mark in the black, green and gold. There was another multiple visitor to the stage, too, with Tom May both collecting a club cap and the Try of the Season award for his second score against London Welsh in Aviva Premiership Round 20.
The other award of the evening went to Jamie Elliott, who capped off a year in which he finished as the Saints' top try scorer by being named the Young Player of the Season.