An alias is a pseudonym.
- In culture
- Alias (TV series), an American television series
- Alias (video game), a video game based on the TV series
- "Alias", a song from the album A Sense of Purpose by Swedish band In Flames
- Alias (comics), an American comic book
- Alias (band), a rock band
- Alias (album), an album by the band Alias
- Alias (artist), Brendon Whitney, a hip-hop artist
- Alias, the heroine of the novel Azure Bonds
- Samsung Alias or Samsung SCH-U740, a cell phone
- Alias Records, a record label
- Alias Enterprises, a United States publishing company
- Alias, the name used by singer songwriter Ryan Tedder when working as a producer
- Alias (board game), a Finnish board game
- Alias (film), a Belgian film by Jan Verheyen (director)
- Alias the Jester, a figure in a British TV-cartoon series
- In computing
- Aliasing, different continuous signals becoming indistinguishable when sampled
- Aliasing (computing), multiple names for the same data location
- E-mail alias, a virtual email address
- Alias (command), a shell command
- Alias (Mac OS), an icon linking to another file
- Alias Systems Corporation (formerly Alias Wavefront)
- PowerAnimator, an Alias Systems Corporation program also known as Alias
- in geography
- Alias, Iran, a village in North Khorasan Province, Iran