An alias is a pseudonym and may also refer to:

In family names:

• An additional component of a surname to distinguish its users from other families of the same surname. So whereas an alias is used nowadays to hide someone's identity, an alias was originally used to clarify identity. As an imaginary example, a member of the Smith family who moved to Exeter might have called themselves Smith Alias Exeter, or Exeter Alias Smith.

In culture:

• Alias (TV series), an American television series starring Jennifer Garner.
• Alias (video game), video game version of the TV series.
• Alias (comics), an American comic book.
• Alias (band), a hard rock band.
• Alias (album), their debut album.
• Alias (artist), Brendon Whitney, an abstract hip-hop artist.
• Alias, the heroine of the novel Azure Bonds.
• Stage name
• Samsung Alias, a cell phone with a qwerty keyboard
• 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

In computing:

• Aliasing, different continuous signals becoming indistinguishable when sampled.
• Anti-aliasing
• Aliasing (computing), multiple names for the same data location.
• Email alias, a virtual email address.
• Alias (command), a shell command.
• Alias (Mac OS), multiple links to same file.
• Alias Systems Corporation (used to be Alias Wavefront)
• PowerAnimator, an Alias Systems Corporation program also known as Alias.