311 (pronounced three eleven) is an American rock band from Omaha, Nebraska. The band met at Westside High School and formed in 1988. Since their self-titled album in 1995, all of their studio albums have peaked in the top 15 of the Billboard Top 200. Eight of their songs have been top 5 hits on the Billboard Modern Rock Radio chart.

In 1991, 311 released their second independent release, Unity, recorded at Rainbow Recording Studios, Omaha, which was released with far greater numbers than their first release Dammit!. While Dammit! only printed 300 cassettes, Unity had 1000 CDs and 500 cassettes printed and was distributed through consignment and also sold at shows. The band began to headline shows in local clubs, such as The Ranch Bowl and Sokol Auditorium, and became a local success.

In 1992, S.A. Martinez, who had been making various appearances with 311 over the past years as a vocalist, had officially been asked to join the band. The newly formed 311 recorded a six-track demo, called Hydroponic, and moved to Los Angeles. Within their first few months, 311 was signed to Capricorn Records.

311 considers their first show to be held on June 10, 1990, opening for Fugazi in Omaha, NE, at the Sokol Auditorium.

311 has finished recording their 'yet to be titled' 10th studio album at the Hive in Los Angeles, with producer Bob Rock. Unlike previous albums where their record label requested that the drums be recorded at an alternate location, all tracks, including the drums, were recorded at the Hive Studio. The album is scheduled to be released before Summer 2011. In recent radio interviews, Nick Hexum has revealed that the album will have a more "focused" approach, with a heavier sound featuring distortion guitars on every song. Two confirmed song titles are "Timebomb" and "Wild Nights" which they debuted on the 311 Caribbean Cruise. 311 has confirmed that Sublime with Rome will be along for the 2011 Unity Tour, with special guests DJ Soulman and DJ Trichrome. Taken from twitter posts from P-Nut, it is said that this will be the shortest album yet.