Guardiola, who has guided City to a third straight Premier League title and is now hunting the Treble, has won the Sir Alex Ferguson trophy for a third time and was also named Premier League Manager of the Year.
City face Manchester United in the FA Cup final at Wembley on Saturday and Inter Milan in the Champions League final in Istanbul on June 10.
Guardiola, who previously won the award in 2017-18 and 2020-21, said: “I’m delighted to receive the Premier League Manager of the Year. It’s an incredible honour to get his trophy.
“We are in the best league in the world and I promise you we will be there next season.”
Arsenal head coach Mikel Arteta, Brighton’s Roberto De Zerbi, Newcastle’s Eddie Howe, Aston Villa boss Unai Emery and Fulham’s Marco Silva had all been nominated.
Vincent Kompany, who guided Burnley straight back to promotion to the top flight, won the Championship award, beating fellow nominees Michael Carrick (Middlesbrough), Paul Heckingbottom (Sheffield United), Rob Edwards (Luton) and Mark Robins (Coventry).
Kompany said: “The players have done it and the staff have been relentless.
“I can still relate to the players, I feel connected to what they are going through. I make mistakes and don’t see myself as the finished article. You make mistakes and learn. I’m pretty pleased where I am today.”
Plymouth boss Steven Schumacher took the League One award after guiding the Pilgrims to the title and Richie Wellens was voted League Two Manager of the Year after leading Leyton Orient to the top of the fourth tier.