Know Your Enemy is a saying derived from Sun Tzu's The Art of War, it may also refer to:
- In music:
- Know Your Enemy (Lȧȧz Rockit album)
- Know Your Enemy, an album by Behind Enemy Lines
- "Know Your Enemy" (Green Day song)
- "Know Your Enemy" (Rage Against the Machine song)
- "Know Your Enemy", a song by Hybrid
- "Know Your Enemy", a song composed by Yoko Kanno from Ghost in the Shell: Stand Alone Complex O.S.T. 3
- In other uses:
- Know Your Enemy: Japan, a 1945 American propaganda film
- "Know Your Enemy", a 1 Pro Wrestling event
