A traveller (American English traveler) is a person or an object travelling between two or more locations.

The word traveller may be used to designate:

1. A human traveller, for pleasure or profession. For this definition, see the related links to:
   • Tourism
   • Transport
   • Time traveller
   • Irish Traveller
   • Backpacking
   • Travellers, a group of social outcasts described in the 1965 dystopian/ environmental catastrophic novel by Brian Aldiss, Earthworks.
2. The role-playing game known as Traveller, published by Game Designers' Workshop (GDW) originally in 1977
3. A mechanical traveller, part of a ship or machine
4. The band Blues Traveler
5. The BBC television series Crime Traveller
6. Traveller, General Robert E. Lee's famous and trusted gray saddlebred horse