Läther (, or "Leather") is the sixty-fifth official album by Frank Zappa. It was released posthumously as a three-CD set on Rykodisc in 1996. The album's title is derived from bits of comic dialog that link the songs. Zappa also explained that the name is a joke, based on "common bastardized pronunciation of Germanic syllables by the Swiss."

Läther integrates many aspects of Zappa's musical oeuvre — heavy rock, orchestral works, and complex jazz flavored instrumentals, along with Zappa's distinctive electric guitar solos and satirical lyrics, all edited together in a seemingly random way.

The Läther album was intended for release in 1977 as a four-LP box set, but it never appeared officially in this format. A variety of bootleg recordings of this material were widely distributed. One of these was a four-LP box on the "Edison Record" label and appeared to be professionally packaged. Some may have believed this was authorized, despite the fact Zappa's name did not appear on the album.