Ondskan may refer to:

• Ondskan (novel), the book by Jan Guillou
• Evil (2003 film), Ondskan, the movie based on the book

• Roberts Hall (Ithaca, New York)
• Roberts (Hampshire cricketer)
• Robert Shannon
• Robert Shannon King
• Robert Shapard
• Robert Shapiro
• Robert Shapiro (chemist)
• Robert Shapiro (disambiguation)
• Robert Shapiro (film producer)
• Robert Shapland George Julian Carew
• Robert Shapley
• Robert Sharer
• Robert Sharman-Crawford
• Robert Sharon Allen
• Robert Sharpe
• Robert Sharples
• Robert S. Harward
• Robert S. Harward Jr
• Robert S. Harward Jr.
• Robert Shatford
• Robert Shatterell
• Roberts Hawaii transportation
• Robert Shaw (blues musician)
• Robert Shaw (business writer)
• Robert Shaw (Canadian politician)