Megaton may refer to:
A million tons Megaton TNT equivalent, explosive energy equal to 4.184 petajoules megatonne, a million tonnes
Other uses Olivier Megaton (born 1965), French film director, writer and editor Megaton Dias (born 1967), a Brazilian jiu-jitsu practitioner and instructor Megaton (Fallout 3), a fictional town built around a nuclear bomb in the video game Fallout 3 "Megaton Punch", a mini-game in the games Kirby Super Star and Kirby Super Star Ultra Megaton, a superhero anthology self-published by Gary Carlson from 1981 to 1987
See also Kiloton Gigaton Teraton Petaton Exaton