An "it girl" is a young woman perceived to have both sex appeal and an engaging personality.

It girl or The It Girl may also refer to:

• Clara Bow (1905–1965), American actress, so nicknamed after her 1927 film It

• The It Girl (novel series), by Cecily von Ziegesar
  • The It Girl (novel), the 2005 first novel in the series
• The IT Girl, a novel by Ruth Ware
• It Girl, an Atomics comic book character

• The It Girl (album), by Sleeper, 1996
• "It Girl", a song by The Brian Jonestown Massacre from Thank God for Mental Illness, 1996
• "It Girl", a song by Apink from Seven Springs of Apink, 2011
• "It Girl" (Jason Derulo song), 2011
• "It Girl" (Pharrell Williams song), 2014
• It Girl (EP), by Petric, 2015
• "It Girl", a song by Elle King from Shake the Spirit, 2018
• "It Girl" (Aliyah's Interlude song), 2023

• It Girls, a 2002 documentary film