| Birth Date: | 31 March 1884 |
| Birth Place: | Stockholm, Sweden |
| Death Date: | 5 February 1938 |
| Death Place: | Stockholm, Sweden |
| Sport: | Athletics, gymnastics |
| Event: | Sprint, hurdles |
| Club: | AIK, Solna Stockholms GF, Täby |
| Pb: | 100 m – 11.3 (1904) 110 mH – 16.0 (1906) |
| Show-Medals: | yes |
Harald Axel Fredrik Ljung (31 March 1884 – 5 February 1938) was a Swedish gymnast and track and field athlete who won an all-around gold medal with the Swedish gymnastics team at the 1908 Summer Olympics.[1] He also participated in the 100 m sprint, 100 m hurdles and standing long jump events at the 1906 Intercalated Games and finished fifth in the long jump.