They Don't Know

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 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