| Birth Date: | 4 November 1880 |
| Birth Place: | Göteborg, Sweden |
| Death Date: | 18 April 1955 (aged 74) |
| Death Place: | Göteborg, Sweden |
| Sport: | Gymnastics |
| Club: | Stockholms GF, Täby |
| Show-Medals: | yes |
Johan Jonatan Assaf "John" Jarlén (4 November 1880 – 18 April 1955) was a Swedish gymnast who competed in the 1908 Summer Olympics. He was a member of the Swedish team that won the all-around gold medal. He later worked as an architect in Göteborg.[1]