Streamline may refer to:
- Operation Streamline
Business
- Streamline Air, American regional airline
- Adobe Streamline, a discontinued line tracing program made by Adobe Systems
- Streamline Cars, the company responsible for making the Burney car
Engineering
- Streamlines, streaklines, and pathlines, in fluid flows
- Streamliner, any vehicle shaped to be less resistant to air
Media
- Streamline, a newsletter published by the Migrant Clinicians Network
- Streamline Pictures, an American distribution company best known for distributing English dubbed Japanese animation
- Streamline Studios, an independent Dutch outsourcing and game developing studio
- Hal Roach's Streamliners, a series of short films made in the 1940s
- Streamline (comics), a fictional super-hero character
Music
- Streamline (band), a band featuring Brian Ireland of Something Corporate
- Streamline (Lenny White album), 1978
- Streamline (Lee Greenwood album), 1985
- "Streamline" (song), a 1994 song by Spanish Makina band called Newton
- "Streamline" (System of a Down song)
- "Streamline", a song by Pendulum, from the 2005 album Hold Your Colour
- "Streamline", a song by From Autumn to Ashes, from the 2005 album Abandon Your Friends
- "Streamline", a song by VNV Nation, from the 2011 album Automatic
- Streamline Ewing (1917–2002), American jazz trombonist
Other
- Orel VH2 Streamline, a French aircraft design
- Streamline (swimming), the position a swimmer takes underwater after pushing off a pool wall
- Streamline Moderne, an architectural style related to Art Deco