The ruffe or Eurasian ruffe (Gymnocephalus cernuus) is a widespread freshwater fish in Eurasia and introduced to North America.

Ruffe may also refer to:

• Any fish of the genus Gymnocephalus
• New Zealand ruffe, Schedophilus huttoni
• Tasmanian ruffe, Tubbia tasmanica
• Sea ruffe, Any fish of the genus Sebastiscus
• Sea ruffe, Sebasticus marmarotus