A parallax is the difference in the angular position of two stationary points relative to each other from different viewing positions.

Parallax may also refer to:

• Dynamical parallax, a method of measuring the distance to a visual binary star
• Parsec (pc), parallax of one arcsecond with a baseline of 1 AU, equal to 3.26 light years.
• Photometric parallax method, a means to infer distances of stars
• Spectroscopic parallax, a method of measuring distances of stars
• Stellar parallax, uses actual geometric parallax to determine distance

• Parallax, Inc. (company), designer and manufacturer of microcontrollers
• Parallax Software, creator of the Descent series
• Parallax Studio, a film and animation studio based in the American Midwest
• Parallax Graphics, a defunct high-spec video card manufacturer

• Parallax mapping, a 3D graphics rendering technique
• Parallax Propeller, a 32-bit microcontroller with eight CPU cores
• Parallax scrolling, a scrolling technique in computer graphics where the background content (for example, a background image of a website or app) is moved at a different speed than the foreground content while scrolling.

• Samuel Rowbotham (1816–1884), who used the pseudonym "Parallax" when promoting his notion of a "flat Earth".

• PARALLAX, a vampire novel by Jon F. Merz
• parallax (journal), an American academic journal on the topics for the disciplines of cultural studies, critical theory, and philosophy
• Parallax: And Selected Poems by Sinéad Morrissey

• Parallax barrier
• Parallax mapping

• Parallax (character), a DC comic book supervillain

• The Parallax View, a 1974 American thriller film starring Warren Beatty

• Parallax (TV series), children's science-fiction series
• "Parallax" (Star Trek: Voyager), an episode of Star Trek: Voyager

• Parallax (video game), a 1986 game for Commodore 64 by Sensible Software
• Parallax, a fictional organization from the video game 2064: Read Only Memories

• Parallax (Greg Howe album), 1995 album by Greg Howe
• Parallax (Atlas Sound album), 2011 album by Atlas Sound
• The Parallax: Hypersleep Dialogues, 2011 EP by Between the Buried and Me
• The Parallax II: Future Sequence, 2012 album by Between the Buried and Me
• Parallax, a Norwegian band