Arbor or Arbour may refer to:

• Tree, a large, perennial, woody plant
  • Arbor Day, a day for planting trees
  • It's Arbor Day, Charlie Brown
• Arbor (garden), a shaded sitting place, e.g. in a garden
• Arbor (tool), a tool used to shape machined work; a tool component that grips or clamps materials to be machined; or a tool component that grips other moving tool components
• Arbor Drugs, a defunct drug store chain

See also

• Arboretum, a botanical garden primarily devoted to woody plants
• Avenue (landscape), a straight road with a line of trees or large shrubs running along each side