NOFX /ˌnɵɛfˈɛks/ is a Californian punk rock band from Los Angeles, California (later relocating to San Francisco). The band was formed in 1983 by vocalist/bassist Fat Mike and guitarist Eric Melvin. Drummer Erik Sandin joined NOFX shortly after. In 1991, El Hefe joined to play lead guitar and trumpet, rounding out the current line-up. The band rose to popularity with their fifth studio album Punk in Drublic (1994), which was certified gold in both the United States and Canada, and is now considered a classic punk album by fans and critics alike. Their seventh studio album So Long and Thanks for All the Shoes (1997) was also certified gold in Canada.

NOFX's mainstream success was signified by a growing interest in punk rock during the 1990s, but unlike many of their contemporaries, they have never been signed to a major label. NOFX has released twelve studio albums, fifteen extended plays and a number of seven-inch singles. Their latest studio album, Self Entitled, was released on September 11, 2012. The group has sold over 6 million records worldwide, making them one of the most successful independent bands of all time. The band also broadcast their own show on Fuse TV entitled NOFX: Backstage Passport.