Yb

YB or Yb may refer to:

Arts and entertainment

 * YB (band), a South Korean rock band (short for Yoon Do Hyun Band)
 * YoungBoy Never Broke Again (born 1999), American rapper
 * Young Buck (born 1981), rapper

Businesses and organizations

 * Youngstown Belt Railroad, a part of the Ohio Central Railroad System
 * Ypatingasis būrys, a Nazi killing squad primarily composed of Lithuanian volunteers
 * BSC Young Boys, a Swiss football club

Computing

 * Yottabit (Yb), a unit of information used, for example, to quantify computer memory or storage capacity
 * Yottabyte (YB), a unit of information used, for example, to quantify computer memory or storage capacity

Other uses

 * Yb, Russia
 * Yang Berhormat, Malay for The Honorable, styled before Members of Parliament
 * Ytterbium, symbol Yb, a chemical element