Which band performs the South Park opening theme song?

The band that performs the South Park opening theme song is Primus.

Primus recorded the show’s distinctive theme, built around a bass-heavy, unconventional rock sound led by bassist and vocalist Les Claypool. During the opening sequence, Claypool’s vocals alternate with lines performed by South Park’s four central children. Kenny’s words are intentionally muffled, matching the character’s parka-covered speech.

The theme was commissioned during Primus’s early major-label period and became one of the band’s best-known pieces of television work. The original version was later rearranged several times. The opening has used different musical treatments across the series, including an electro-funk arrangement, a bluegrass-influenced version, and later electro-rock styles, while retaining the recognizable core melody.

The original unaired composition was slower and lasted about 40 seconds, but Parker and Stone considered it too long for the opening and had it sped up. Primus also contributed to South Park-related music beyond the theme, including the 1998 soundtrack album Chef Aid: The South Park Album. The band’s eccentric sound helped establish the show’s irreverent tone before each episode began.