Monster Energy is an energy drink that was created by Hansen Natural Company (now Monster Beverage Corporation) in April 2002. As of 2022, Monster Energy had a 30.1% share of the American energy drink market, the second-highest after Red Bull.

As of July 2019, there were 34 different drinks under the Monster brand in North America, including its core Monster Energy line, Java Monster, Zero Ultra, Juice, Maxx, Hydro, HydroSport, Extra Strength, Dragon Tea, Muscle, Import, and Rehab.

Monster Energy is known for their sponsorship and support for extreme sports events, such as Bellator MMA, Ultimate Fighting Championship, ONE Championship, MotoGP, BMX, motocross, Motorcycle speedway, skateboarding, snowboarding and the Monster Energy NASCAR Cup Series (2017–19). Monster currently sponsors the FIA World Rallycross Championship, the Invictus Games Foundation, rally driver Oliver Solberg, two of Dreyer & Reinbold Racing's Nitro Rallycross drivers, the PBR: Unleash the Beast Professional Bull Riders tour, the bag of golfer Tiger Woods, F1 team McLaren as well as the helmets of the Mercedes AMG Petronas F1 drivers. The company also has a strong presence in the music industry, promoting a number of bands and artists around the world in the Monster Energy Outbreak Tour, like Fetty Wap, Iggy Azalea, 21 Savage, Asking Alexandria, Anthrax, Strange Music, The Word Alive, Machine Gun Kelly, Suicidal Tendencies, Maximum the Hormone, Korn, Poppy, Papa Roach, and Five Finger Death Punch.