Karl Johan Ljungberg (22 November 1868 – 11 July 1943) was a Swedish civil engineer who was a professor at KTH Royal Institute of Technology. He also represented his native country at the 1908 Summer Olympics in Ryde, Isle of Wight, Great Britain in the 8 Metre keelboat, placing fifth.

Further reading

  • (PDF). London: British Olympic Association. 1908. Archived from (PDF) on 2013-01-16.