The MGM Music Hall at Fenway is a 5,009-capacity music venue located to the direct northeast of Fenway Park in Boston, Massachusetts. Boston mayor Michelle Wu held the venue's ribbon-cutting ceremony on August 22, 2022, followed by a short private concert by Guster for the students of Tufts University. The venue's first public concert was performed by Massachusetts-bred rock band Godsmack on August 27. The venue is owned by Fenway Sports Group and operated by Live Nation Entertainment.

On September 28, 2018, the Fenway Sports Group (FSG) announced plans to build a 5,000 seat music venue on a lot along the northeast perimeter of Fenway Park then mainly used for video production truck parking. Gilbane built the venue, originally simply known as Fenway Theater during construction, until a naming rights agreement was made with MGM Resorts International in November 2019. The MGM Music Hall at Fenway broke ground on November 22, 2019, and was initially intended to be complete in the fall of 2021.

The MGM Music Hall at Fenway opened its doors on August 22, 2022, a year later than expected, due to construction and performer delays in the wake of the COVID-19 pandemic, The opening ceremony featured a public ribbon-cutting from Boston mayor Michelle Wu, and a 30-minute private concert from the Boston-based rock band Guster for the students of Tufts University. Massachusetts rock band Godsmack performed the venue's first public concert on August 27.

The MGM Music Hall at Fenway was used to host a Call of Duty League (CDL) Major with the hometown Boston Breach as the host, in 2024. Additionally, the venue will play host to the 2025 Six Invitational, the world championship for the video game Tom Clancy's Rainbow Six Siege, from February 14 to 16, 2025.