The Scot led the Bluebirds to promotion to the Premier League and also the league title was awarded the accolade in Monday night's award ceremony.
The former Watford man took his side to the top of the table in November and they stayed their all season but Mackay did not pick up one manager of the month award.
"I am just very proud of the whole club - a lot of people in the last two years have put hard work into building this," Mackay told the club's official website.
- Sports & Recreation
- award ceremony