They Don't Know may refer to:

• "They Don't Know" (Kirsty MacColl song), 1979, later a hit for Tracey Ullman
• "They Don't Know" (Jon B. song), 1998
• They Don't Know (So Solid Crew album), 2001
  • "They Don't Know" (So Solid Crew song), 2001
• "They Don't Know" (Paul Wall song), 2005
• "They Don't Know" (Savage song), 2005
• "They Don't Know" (Disciples song), 2015
• They Don't Know (Jason Aldean album), 2016
  • "They Don't Know" (Jason Aldean song), 2016
• "They Don't Know", a song by Amar Mohile and Kunal Ganjawala from the 2005 Indian film Ek Ajnabee
• "They Don't Know", a song by Ariana Grande from Trolls, 2016
• "They Don't Know", a song from the musical Thoroughly Modern Millie
• "They Don't Know", a song by Rico Love

• They Know (disambiguation)

This disambiguation page lists articles associated with the title They Don't Know.
If an internal link led you here, you may wish to change the link to point directly to the intended article.