Atari is the brand name used by several companies and corporate entities for video games and related merchandise. It can be used without qualifiers to refer to:
- Atari 2600, video game console released in 1977, often colloquially known as an "Atari"
- Companies
- Atari, Inc. (founded 1972) (1972–1984), the original company co-founded by Nolan Bushnell and Ted Dabney
- Atari Corporation (1984–1996), the corporation formed by Jack Tramiel from the original Atari Inc.'s Consumer Division assets
- Atari Games (1984-2003), corporation spun off from the original Atari, Inc.'s Coin-Op division
- Atari SA (2009–present), the former Infogrames Entertainment, SA, a French holding company who owns and runs the current Atari branded divisions
- Atari, Inc. (founded 1993) (2003–present), the US division of Atari, SA
- Atari Interactive, the current holding company of the Atari brand and a division of Atari, SA
