Long Tall Weekend is the seventh studio album by American alternative rock duo They Might Be Giants, released in 1999. It was released exclusively online through the digital music service eMusic. The album was the band's first since their departure from the major label Elektra. Long Tall Weekend was also the first full-length album released exclusively on the Internet by an established major label band. Although the album's primary release was digital, CDs of the album were issued promotionally. Following the success of the album's release through eMusic, TMBG went on to issue a digital series of rarities collections — TMBG Unlimited — through their website.

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.