Darak or Derak ({{lang-fa|درك or دارك}}) in Iran may refer to:

• Darak, Hormozgan (درك - Darak)
• Darak, Khuzestan (دارك - Dārak)
• Darak, Qazvin (درك - Darak)
• Derak Rural District, in Fars Province
• Darak, Sistan and Baluchestan (درك - Darak), beaches in Sistan and Baluchestan
• Mount Derak, a sedimentary rock mountain located in Shiraz, Fars

• Knut Hjalmar Ferdinand Frænkel
• Knut Hjeltnes
• Knut Hjeltnes (disambiguation)
• Knut H. Kallerud
• Knuth Morris Pratt
• Knut H. Njos
• Knut H. Njøs
• Knut Hohne
• Knut Holmqvist
• Knuth reward
• Knuth's Simpath algorithm
• Knuth transform
• Knut Husebo
• Knut Husebø
• Knut Höhne
• Knuth–Bendix completion
• Knuth–Morris–Pratt
• Knuth’s Algorithm X
• Knut Jacobsen
• Knut J. Helmers
• Knut Johannsenn
• Knut Johansson
• Knut Johan Ångström
• Knut Jungbohn Clement
• Knut Kjær