"She's Not There" is the debut single by the English rock band the Zombies, written by keyboardist Rod Argent. It reached No. 12 in the UK Singles Chart in September 1964, and No. 2 on the Billboard Hot 100 in the United States at the beginning of December 1964. In Canada, it reached No. 2.

Rolling Stone magazine ranked "She's Not There" No. 297 on its list of the 500 Greatest Songs of All Time.

In 2016, the song by the Zombies was inducted into the Grammy Hall of Fame.

Rod Argent built the lyrics of "She's Not There" from a John Lee Hooker song, whose title – "No One Told Me" – became a part of the opening phrase of "She's Not There". Following an 29 April 1964 performance by the Zombies at St Albans Market Hall, Argent played the one verse he had written of the song for Ken Jones who was set to produce the band's first recording session. Jones encouraged Argent to write a second verse, intending the band to record it. Argent recalls: "I wrote the song for Colin's range" – referring to Zombies' vocalist Colin Blunstone – "I could hear him singing it in my mind." Describing his first impression of the song, bassist Chris White stated: "It was absolutely fascinating. The song was breathtaking in its approach. We worked on some ideas and found out what to play in the bass. [...] That was Rod's first real experience of songwriting."

The song's genres and musical styles are described by authors and music journalists as jazz rock, beat, pop rock, baroque pop, and R&B.

Lyrically, the song takes place after the breakup of an adolescent relationship, where the male narrator laments "someone who wasn’t what they seemed, leaving a trail of lies and broken hearts." Whilst many lines reminisce about the ex-girlfriend's allure and physical beauty, the refrain of "But she’s not there" carries both a "literal and metaphorical [meaning], suggesting her physical absence and the emotional void she left behind," in addition to implying a lack of sincerity beneath her charming exterior. However, the narrator is not addressing the girl, but rather his friends who were aware of her character yet failed to warn him. When asked about the identity of the song's female subject in a 2020 interview with Forbes, Argent responded that "she wasn’t anybody, just a fictional character. It was just me weaving a story, basically."

"She's Not There" was the second of four songs recorded by the Zombies at a 22 June 1964 recording session at Decca's West Hampstead Studio 2. The backing tracks needed seven takes. One of the song's most distinctive features is Argent's electric piano sound; the instrument used was a Hohner Pianet. The backing vocals are in a folk-influenced close-harmony style. To make the single sound stronger for single release, Ken Jones organised Hugh Grundy to record a strident drum line overdub which only appears on the original mono single mix.

The B-side was the Chris White-penned "You Make Me Feel Good", which band biographer Claes Johansen characterized as "pure Beat Boom. With its mid-tempo performance and accentuation on the first beat and second off-beat of each bar it is also a blueprint for how a typical Zombies song would sound during most of their Decca period." Initially, the band considered releasing this song as their debut single, but ultimately opted for "She's Not There". Argent has since praised the track, contending that it "should have been the follow-up [single]."