Self (sometimes written sElf or SeLF) is an American alternative pop/rock band from Murfreesboro, Tennessee and is largely the creative vision of writer, singer, producer, and multi-instrumentalist Matt Mahaffey.

Though it is not considered a solo project, Matt Mahaffey is the primary performer of all instrumentation and vocals on studio albums. The other members contribute occasional parts on albums and participate in live performances. The band currently consists of Chris James (keyboards, piano, samplers, guitar, backing vocals), Mac Burrus (bass guitar, keyboards, horns, backing vocals), and Jason Rawlings (Drums). Past members include Matt's brother, Mike Mahaffey (lead guitar, keyboards, vocals) and Timm Nobles (bass guitar). Mahaffey cites Electric Light Orchestra, Prince, and Pixies as some of his biggest musical influences.