You Don't Know

You Don't Know may refer to:

• "You Don't Know" (702 song), 1999
• "You Don't Know" (Berlin song), 1986
• "You Don't Know" (Cyndi Lauper song), 1997
• "You Don't Know" (Helen Shapiro song), 1961
• "You Don't Know" (Kierra Sheard song), 2004
• "You Don't Know" (Eminem song), featuring 50 Cent, Lloyd Banks, and Cashis, 2006
• "You Don't Know" (Smoove & Turrell song), 2009
• "You Don't Know", a song by KC and the Sunshine Band from Do It Good, 1974
• "You Don't Know", a song by Milow, 2006
• "You Don't Know", a song by Missy Elliott from Da Real World, 1999
• "You Don't Know", a song by Scarlett and Black, 1986
• "You Don't Know", a song by Westlife from World of Our Own, 2001
• "You Don't Know", a song from the musical Next to Normal, 2008
• You Don't Know, a sampler album issued by Ninja Tune, 2008