The 29-year-old England international joined City in the summer of 2018 after six years with Liverpool and went on to make 69 appearances in all competitions, scoring 11 goals from defence and helping the team to two Women’s FA Cup successes and one Continental Tyres Cup during that time.
The centre-half will now depart the Academy Stadium however, with her next port of call being the Lynn Family Stadium ahead of the start of the upcoming National Women’s Soccer League season.
Speaking about her departure, Bonner said: “After two-and-a-half years in Manchester, I have taken the difficult decision to leave Manchester City and accept an offer from Racing Louisville for a new challenge in my career.
“Manchester City is a fantastic club and I have been grateful to work alongside some great people and players.
“I leave with some great memories and although the last few months have been very frustrating for me on an injury front, which has meant I was unable to contribute on the pitch, I really appreciate all the support that I received from my team, staff and of course, the fans.
“I believe however that the time is now right for the next chapter in my football journey and I am looking forward to the challenge of playing in the NWSL.”
Gareth Taylor, Manchester City Women Head Coach, added: “Gemma is a true professional and has been a great person to work with since I joined as Head Coach last summer.
“She is a real team player and has been incredibly supportive of the squad throughout her time here.
“She has given her absolute all for the Club since she joined in 2018, but this opportunity with Racing Louisville is a fantastic one for her.
“On behalf of everybody at Manchester City, I’d like to thank her for everything she has contributed to the team and wish her all the very best for the next chapter of her career.”
