Mark 25 or MK 25 or variation, may refer to:
Mark 25, a trailerable sailboat Mark 25 torpedo MK 25, a variant of the SIG Sauer P226, used by US Navy SEALs MK25, a variant of the Medium Tactical Vehicle Replacement Spitfire Mk25, an Australian homebuilt aircraft modeled after the WWII British Supermarine Spitfire