City moved decisively to beat Arsenal to Monga's signature, having reportedly seen off interest from both the Gunners and Manchester United in a deal worth £10million plus add-ons, according to Sky Sports.
Monga came through Leicester's academy from Under-9 level, rapidly progressing to their Under-21s at just 15 before making history as the second-youngest player to feature in the Premier League, coming on as a substitute against Newcastle in April 2025. He went on to make 37 senior appearances for the Foxes in total, and became the youngest goalscorer in Championship history last season, aged 16 years and 37 days, breaking a record previously held by Jude Bellingham.
Monga said he had no hesitation once City's interest became known.
"When I became aware that Manchester City were interested, I knew instantly this was the right choice for me," he said.
"For any young footballer, to become part of this amazing club is a dream come true. This has been the best club in England over the past 10 years.
"And it has also handed opportunities to players from the academy like Phil Foden and Nico O'Reilly, which shows that the pathway is there. It is a privilege to be here and I'm delighted to have joined."
City director of football Hugo Viana said the club had tracked Monga closely, with new head coach Enzo Maresca also familiar with him from his time in charge at Leicester.
"Jeremy is an exciting player who has already made huge strides in his young career," Viana said. "We were already very aware of him as a club and we have seen his ability first-hand from his time at Leicester.
"At 17 years old we feel he is only going to continue to improve and that this is the correct next step in his career. We look forward to supporting him on every step in his journey."
Elsewhere at the Etihad, Manchester City have sent Norwegian midfielder Sverre Nypan out on a second loan spell, this time to Belgian Pro League side Lommel SK, part of the same City Football Group network, for the 2026/27 season.
Nypan, 19, made 21 appearances during a mixed loan spell at Middlesbrough last season after joining City from Rosenborg a year ago, and remains under contract at the Etihad until 2030.