Zzz

ZZZ, Zzz, zZz, or zzz may refer to:

• zzz, a cross-linguistic onomatopoeia for snoring or sleeping
  • A series of Zs in a speech balloon, a comic book convention for snoring or sleeping

• zZz, a Dutch band from Amsterdam
• ZZZ, a 2018 album by Zion.T
• "ZZZ", a 2016 song by Empire of the Sun from the album Two Vines
• Zzz, a song produced by Kenichi Maeyamada performed by Sayaka Sasaki
• "Zzz", a silent track on the 2014 album Sleepify by Vulfpeck
• Zero Zero Zero, a 1998 compilation album by Sam Phillips

• Zenless Zone Zero (Chinese: 绝区零, romanized: Jué qū líng), 2024 video game developed by HoYoverse
• Union of Trade Unions (Związek Związków Zawodowych), a 1930s Polish trade union confederation
• ZZZ, the production code for the 1974 Doctor Who serial Planet of the Spiders
• Emoji U+1F634 😴 SLEEPING FACE
• Emoji U+1F4A4 💤 SLEEPING SYMBOL

• ZZZZ, the four-letter placeholder ICAO airport code
• Zzzz, the ISO 15924 code for uncoded script
• ZZZZ, a mid-2000s rock band including former members of the band Sweep the Leg Johnny
• "Zzzz", a silent track on the 2014 album Sleepify by Vulfpeck
• "ZzZz", a song on the 2019 studio album Reality in Black by Mamamoo
• "ZzZz", a song on the 2021 EP Hide & Seek by Purple Kiss

• "ZZZZZ", a 1964 episode of The Outer Limits
• Zzzzzz (joke line), a joke line based in Los Angeles