Conor Chaplin opened the scoring for the Tractor Boys, but Birmingham equalised in the closing minutes of the first half through Jordan James.
Jeremy Sarmiento put Town ahead, before Omari Hutchinson wrapped up the points in stoppage time.
The result means Ipswich are level on points with second-placed Leeds, but have an inferior goal difference.
Boss McKenna said: “It was a really good performance and I was pleased with all aspects of it.
“We were really good off the ball, aggressive against a good footballing team, and attacked well.
“It was an excellent performance and a really good day.
“I thought we started the game excellently and we didn’t let up too much in the first half. They tried to break the flow and I felt like the goal was coming.
This story is from the February 25, 2024 edition of The Football League Paper.
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This story is from the February 25, 2024 edition of The Football League Paper.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
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