Arbor or arbour may refer to:

  • Arbor (garden), a landscape structure
  • Arbor (tool) or mandrel
  • Arbor, California
  • Arbor, a counterweight-carrying device found in theater fly systems
  • Arbor, the central post of a fishing reel to which fishing line is attached
  • Arbor knot, a knot commonly used to attach fishing line to a fishing reel
  • Arbor Drugs, a defunct Detroit, Michigan-based drug store chain