Metrosource (now stylized as M) is a bi-monthly gay and lesbian lifestyle magazine, published by Metrosource Publishing in New York City. Metrosource Magazine has three editions: M NY (Metrosource New York), M LA (Metrosource Los Angeles) and National edition.

Metrosource was first published in 1990 as a local New York publication, the magazine has been distributed nationally since the mid-1990s. Metrosource is geared towards the modern metropolitan gay community. Metrosource covers popular culture, entertaining, design, travel, health, fitness, and telling the stories of gay and gay-friendly people. Metrosource connects its readers with the businesses that want to support the LGBT community.

Owner and publisher Rob Davis had a vision with a dual purpose: to create a publication with stories and imagery that readers could be proud to read and display in their homes and share with friends and family; and to create a place where advertisers could let LGBT people know that their patronage is welcome at their places of business.

Metrosource is the third largest gay and lesbian publication in the United States.