Greg Malone may refer to:

• Greg Malone (actor) (born 1948), Canadian impressionist and actor
• Greg Malone (ice hockey) (born 1956), professional ice hockey player

• Acetyl homotaurine
• Acetyline
• Acetyl-L-Leucine
• Acetylneuraminyl hydrolase
• Acetyl nitrate
• Acetyl phenol
• Acetyl-phosphate:L-lysine N6-acetyltransferase
• Acetyl propane
• Acetylsalicylate estradiol
• Acetylsalicylate O-acetylhydrolase
• Acetylserotonin methyltransferase
• Acetylthiocholine
• Acetyl tributyl citrate
• Acetyl—CoA synthetase
• Acevedo, Anthony
• Acevedo, Aníbal
• Acevedo (disambiguation)
• Acevedo, Javier
• Acevedo, José
• Acevedo, Venezuela
• A.C. Evensen
• Ace Ventura (film series)
• Ace Ventura, Jr.: Pet Detective
• Ace Ventura-Pet Detective
• Ace Ventura (video game)