Tub may refer to:

• A tub (container):
  • a round or oblong container with or without a lid:
    • a plant pot
  • a shallow, plastic or paper container, typically with a lid or closure
  • Tub (unit), a former quantity for sale or butter or cheese
• A bathtub, a plumbing fixture for bathing
• Hot tub, a large bath or small pool designed to comfortably hold multiple persons
• Quarry tub, a type of railway or tramway wagon
• Slack tub, in blacksmithing, a quench
• Tub boat, an unpowered cargo boat used on early canals
• Twin tub, a type of washing machine
• Tub file, in computing, an early, primitive random access memory technology.
• Tub Welch, a baseball player.

TUB may refer to:

• TUB (gene)
• Citroën TUB, a light van
• Technical University of Berlin (Germany)
• Transports Urbains du Beauvaisis, local public transport operator in northern France
• Tubuai – Mataura Airport (IATA airport code)

TUBS or Tubs may refer to:

• Time unit box system, a system for notating events that happen over a time period.
• Tokai University Boarding School in Denmark
• Ryan Tubridy, Irish television and radio presenter.