Ruas is a surname. Notable people with the name include:
Arturo Ruas (born 1981), Lebanese-born Brazilian professional wrestler, Jiu-Jitsu practitioner, and former amateur wrestler Charles Ruas (born 1938), American author, translator, literary and art critic, and interviewer Douglas Ruas (born 1989), Brazilian politician Hércules Brito Ruas (1939–2026), Brazilian footballer known as Brito Marco Ruas (born 1961), Brazilian mixed martial arts fighter, submission wrestler and instructor Maria Aparecida Soares Ruas (1948–2025), Brazilian mathematician and university professor Simone Ruas (1919–2001), French Olympic high jumper