Martin Lee Gore (born 23 July 1961) is an English musician, singer, and songwriter. He is one of the founding members of the electronic music band Depeche Mode and is the band's main songwriter. He is the band's guitarist and keyboardist, and occasionally provides lead vocals. Gore possesses a tenor singing voice which contrasts with lead vocalist Dave Gahan's dramatic baritone. He is also known for his flamboyant and (sometimes) androgynous stage persona. Gore has also released several solo albums and collaborated with former Depeche Mode member Vince Clarke as part of VCMG.

Gore's songs include themes such as sex, religion and politics. He has said he feels lyrical themes that tackle issues related to solitude and loneliness are a better representation of reality, whereas he finds "happy songs" fake and unrealistic. At the same time, he asserts that the band's music contains "an element of hope".

In 1999, he received the Ivor Novello Award from the British Academy of Songwriters, Composers and Authors for "International Achievement". In 2019, he was given the Moog Innovation Award "for his many contributions to the exploration of sound in popular music". In late 2020, he became a Rock and Roll Hall of Fame member with fellow active Depeche Mode members Dave Gahan and Andy Fletcher, as well as past members Clarke and Alan Wilder. Following the death of Fletcher in May 2022, Gore became the longest-serving member of the band.

Martin Lee Gore was born in London, England. His biological father was an African-American G.I. stationed in Britain. Gore was raised by his stepfather David Gore and biological mother Pamela, who both worked at the Ford of Britain motor plant in Dagenham. He believed his stepfather was his biological father until the age of 30, when he learned of his biological father. Gore later met his biological father in the American South.

Gore has described his upbringing as "normal" and "stable" and has said that he was an introvert who preferred to spend time reading alone rather than with school peers. He stated that he enjoyed his time at school and took part in foreign exchange trips. His family briefly lived in Hornchurch during his upbringing before moving to Basildon, where he attended the Nicholas Comprehensive School. During school he was the guitarist in a local band called Norman and the Worms.

Gore taught himself to play keyboard from the 1970s, never receiving formal training. He learned to perform chart hits, figuring out their structures via the magazine Disco 45. He shared a class with Andy "Fletch" Fletcher, Alison Moyet and Perry Bamonte. Gore left Nicholas Comprehensive after completing his A-levels in 1979 and took a job as a bank cashier. During evenings, weekends and any other spare time, he remained involved with Norman and the Worms. He became interested in electronic music upon hearing acts such as Kraftwerk, the Human League and OMD. He borrowed a Korg 700S from a friend, before purchasing a Yamaha CS5, his first synthesizer.

Gore has two younger half-sisters, Karen, born in 1967, and Jacqueline, born in 1968.

In 1980, Gore reunited with classmate Andy Fletcher at the Van Gogh club. Fletcher recruited him into his band Composition of Sound, along with Vince Clarke. Soon the band drafted Dave Gahan to be the band's lead singer after hearing him sing "Heroes" by David Bowie. Gore is the band's keyboardist, guitarist on several songs, contributes backing vocals, and occasionally provides lead vocals.