Karl Erik Krook (January 10, 1887 - April 4, 1966) was a Swedish tug of war competitor who competed in the 1908 Summer Olympics. He was born in Lindesberg, Örebro, Sweden, and died in Norrköping, Östergötland, Sweden. In 1908 he finished fourth with the Swedish team in the Olympic tug of war contest.
- "Karl Krook". Olympedia. Retrieved 12 April 2021.