Just as he did at the end of the 2014-15 campaign, the Brazilian also won Players' Player of the Year as well as Goal of the Season for his solo effort away at Manchester United in the Europa League last-16 in March and Performance of the Season for his exceptional display in the 4-1 win at Manchester City back in November.
Player of the Year, as voted for by the club's supporters, also went Coutinho's way as he retained the four accolades he won in the previous season, beating compatriot Roberto Firmino, Nathaniel Clyne and Emre Can.
With two games to go until the end of the season, the 23-year-old has thus far netted 12 goals in all competitions - his best tally in a red shirt - as well as registering six assists in 42 games.
That figure includes a number of vital goals in matches of the highest pedigree, including the Capital One Cup final against Manchester City as well as a variety of excellent strikes from distance against the likes of Chelsea, Tottenham Hotspur, Everton, Southampton, Stoke City and Borussia Dortmund.
Speaking on the podium after being awarded Performance of the Season for his contributions in the demolition of City at the Etihad, in which he scored one and assisted another, Coutinho said: "I want to say thank you again to all the fans. It was a really good performance by the team from the first minute onwards."
He also earned a rapturous round of applause from the crowd when accepting his award for Goal of the Season, for which he chipped United goalkeeper David de Gea at his near post after a mazy run at Old Trafford, telling the crowd: "Yes, it was a good goal, but the important thing is that it helped beat them!"
Emre Can and Brad Smith also amongst the awards
Can's efforts were also recognised as he won the Young Player of the Year award in reward for an excellent campaign that has seen him go from strength-to-strength, particularly since the appointment of Jürgen Klopp.
Beating contenders such as Divock Origi and Brad Smith, 22-year-old Can's excellent season has seen up rack up 48 appearances, a tally which should stretch to 49 if, as expected, he starts in the UEFA Europa League final next Wednesday.
Despite only notching two goals and two assists, Can's driving performances from the heart of midfield - evident in Anfield wins over Dortmund and Villarreal in recent months - have undoubtedly spurred the Reds on to many of their best victories this season.
Elsewhere, left-back Smith - who nearly left the club after his contract expired last summer before a dramatic u-turn tied him to a new long-term deal - was awarded Academy’s Players’ Player of the Year whilst Martha Harris was given Players' Player of the Season for Liverpool Ladies FC.
22-year-old Smith has so far made nine first-team appearances, including scoring his first goal for the club in the FA Cup at Exeter City in January, and could make his 10th at West Brom on the final day of the season this Sunday.
Elsewhere, Steve Heighway's services to the club across five decades saw him awarded the Lifetime Achievement Award, presented to him by Robbie Fowler and Margaret Aspinall, chair of the Hillsborough Family Support Group at the Exhibition Centre in Liverpool city centre.