NOFX is an American punk rock band formed in Los Angeles, California (now based in San Francisco), in 1983.

The original lineup included singer/bassist Fat Mike (Michael Burkett), drummer Erik Sandin, and guitarist Eric Melvin. Since 1991 (and after several line-up changes) El Hefe (Aaron Abeyta) has played lead guitar and trumpet. The band rose to popularity in 1994 with their album Punk in Drublic which was certified gold.

NOFX has released 10 studio full lengths, 15 EPs, and many 7" singles. The group has independently sold over 6 million records worldwide.