ROSA Linux is a Linux operating system distribution, developed by the Russian company 'LLC NTC IT ROSA'. It is available in three different editions: ROSA Desktop Fresh, ROSA Enterprise Desktop, and ROSA Enterprise Linux Server, with the latter two aiming at commercial users. Its desktop computer editions come bundled with closed-source software such as Adobe Flash Player, multimedia codecs, and Steam.

ROSA originated as a fork of now defunct French distribution Mandriva Linux and has since then been developed independently. The ROSA company was founded in early 2010 and released the first version of its operating system in December 2010. It initially targeted enterprise users only, but in late 2012, ROSA started its end-user oriented distribution, Desktop Fresh. Before its bankruptcy, Mandriva developed its last releases jointly with ROSA. Mandriva 2011 was also based on ROSA. Also MagOS Linux, is based on ROSA.

Although its main popularity is in the Russian language market, ROSA Desktop also received favorable reviews by several non-Russian online publications. German technology website Golem.de praised ROSA for its stability and hardware support, while LinuxInsider.com called ROSA "a real Powerhouse".