Ruhl is a surname. Notable people with the surname include:

• Dave Ruhl (1920–1988), Canadian professional wrestler
• Donald J. Ruhl (1923–1945), American Marine; awarded Medal of Honor for action at Iwo Jima
• Henry Ruhl (born 1945), American murderer; executed in Wyoming
• J. B. Ruhl (contemporary), American legal academic specializing in environmental law
• Sarah Ruhl (born 1974), American playwright
• William Ruhl (1901 – 1956), American character actor

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