Doin' It or Doing It may refer to:

• Doing It (novel), 2004 novel by Melvin Burgess
• Doing It: Let's Talk About Sex, 2017 book by Hannah Witton

• Doin' It, 1969 album by Spanky Wilson
• Doin' It, 2001 album by Papa Grows Funk
• "Doin' It" (LL Cool J song), 1996
• "Doin' It" (Liberty X song), 2001
• "Doing It" (Charli XCX song), 2014
• "Doin' It" (Big Boi song), 2019
• "Doin' It", song by Herbie Hancock on the album Secrets

• "Doing it", a slang phrase for sexual intercourse

• Do It (disambiguation)