MP9 or MP-9 can refer to:
- Brügger & Thomet MP9, a machine pistol
- Interdynamic MP-9, a submachine gun
- Ruger MP9, a submachine gun
- MP9, a zone during the Eocene epoch
- Mario Party 9, a 2012 Wii video game and the second and final game for the console
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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