Traveler or traveller (see American and British English spelling differences) commonly refers to one who travels, especially to distant lands.

It may also refer to:

• The Travelers Companies, an insurance company
• Traveler (mascot), official mascot of University of Southern California
• Traveller (horse), owned by General Robert E. Lee
• Fellow traveler, a socio-political term
• Mechanical traveller, part of a ship or machine
• Traveler Mountain, a mountain in Maine; the highest peak is called "The Traveler"

Human groups:

• Bedouin
• English Travellers
  • Scottish travellers, a nomadic or itinerant people of Scottish origin
  • New Age travellers
• Pavees or Irish Travellers, a nomadic or itinerant people of Irish origin
• Indigenous Norwegian Travellers
• Romani people and their various subgroups
• Quinqui

In business

• The Travelers Companies, an American insurance company
• Traveller's Inn, a Canadian hotel chain

In music:

• Traveller (album), an album by Christy Moore
• Traveller (Slough Feg album), an album by The Lord Weird Slough Feg
• Traveler (Colin James album), an album by Colin James
• Traveler (Steve Roach album), an album by Steve Roach
• Traveller (song), a single by Aiko Kayo
• "The Traveller", a song from Joe Satriani's studio album Strange Beautiful Music
• "The Traveller", a song from A Flock of Seagulls's studio album Listen

In film:

• Traveller (1981 film)
• Traveller (film), a 1997 film starring Bill Paxton and Mark Wahlberg
• The Time Traveller (character), the protagonist in The Time Machine

In television:

• Traveler (Star Trek), a fictional character in the Star Trek universe
• Traveler (TV series), a television series on American Broadcasting Company
• "Travelers" (Stargate Atlantis), an episode in Stargate Atlantis
• Travelers (The X-Files), an episode in The X-Files (Season 5)

In literature:

• The Traveler (novel), a 2005 novel by John Twelve Hawks
• The Traveler: An American Odyssey in the Himalayas, by Eric Hansen
• The Traveller (1954 novel), a 1954 time-travel story by Richard Matheson.
• Traveller (novel), a historical novel by Richard Adams about General Robert E. Lee's horse of the same name
• Traveler (novel series), a series of post-apocalyptic novels written by multiple writers under the pseudonym D. B. Drumm
• The Traveller (character), the hero of James Herbert's graphic novel The City
• Travelers, a group of social outcasts in the novel Earthworks
• Traveler- a type of person from the "Pendragon Series" by DJ Machale.

In gaming:

• Starship Traveller, roleplaying gamebook written by Steve Jackson
• Traveller (role-playing game), series of related science fiction role-playing games, first published in 1977 by Game Designers' Workshop
• Traveling sheet, used to record scores in the card game of duplicate bridge

In cameras:

• Traveler (camera), a digital camera brand

In nature:

• Traveller (moth)

In ships

• USS Traveler (SP-122), a United States Navy patrol boat in commission from 1917 to 1919
• USS Traveller (1805), a United States Navy supply boat in commission in 1805