"Don't Let's Start" is a song by the alternative rock band They Might Be Giants, from their 1986 eponymous debut album. It was the first single released from the album, released as a maxi-single. The single peaked at number 94 on the Australian ARIA singles chart in 1988. It was re-released by Elektra in 1990 after the success of the band's third album, Flood.

They Might Be Giants, often abbreviated as TMBG, is an American alternative rock band formed in 1982 by John Flansburgh and John Linnell. During TMBG's early years, Flansburgh and Linnell frequently performed as a musical duo, often accompanied by a drum machine. In the early 1990s, TMBG expanded to include a backing band. The duo's current backing band consists of Marty Beller, Dan Miller and Danny Weinkauf. They have been credited as vital in the creation and growth of the prolific DIY music scene in Brooklyn in the mid-1980s.