Kjell Gunnar Isaksson (born 28 February 1948) is a retired pole vaulter from Sweden, who broke the world record several times in 1972.

First he broke the record set by Christos Papanikolaou of Greece and San Jose State University two years earlier, by jumping 5.51 metres in Austin, Texas, becoming the second man to clear 18 feet.

[10] Isaksson achieved international fame in the late 1970s as one of the most successful Superstars competitors, winning two European titles and finishing second in the inaugural 1977 World Championship.

He dominated the European competition in 1975 and 1976, defeating the British Superstar David Hemery twice, and scoring 56 points (out of a maximum 80) in the 1975 final.

This gave him a major chance in the 1977 World Championship, though he was hindered by the IAAF disqualifying him from professional athletics competition (and thus the running events).