Mary Osborne (1921–1992) was an influential American jazz guitarist and singer, notable for her contributions to the genre during a time when female musicians were often marginalized. Born in New York City, she began playing guitar at a young age and was inspired by the likes of Django Reinhardt and Charlie Christian. Osborne's style blended elements of swing, bebop, and traditional jazz, showcasing her virtuosic technique and innovative chord progressions. She gained recognition in the 1940s and 1950s, performing with prominent jazz figures such as Billie Holiday, Benny Goodman, and Dizzy Gillespie. Her notable works include recordings like "Mary Osborne Plays Jazz Guitar" and live performances that demonstrated her unique approach to improvisation. Despite facing gender barriers in a male-dominated field, Osborne paved the way for future female guitarists and musicians in jazz. Her contributions helped to broaden the scope of jazz guitar and inspired a generation of artists. Osborne's legacy continues to resonate, as she is remembered not only for her musical prowess but also for her role in promoting women's visibility in jazz.