| Vanja Blomberg | |
| Birth Date: | 1929 1, df=yes |
| Birth Place: | Göteborg, Sweden |
| Discipline: | WAG |
| Club: | Huskvarna GF, Jönköping |
| Show-Medals: | yes |
Vanja Hedvig Desideria Blomberg (later Webjörn, born 28 January 1929) is a retired Swedish gymnast. She was part of the Swedish teams that won gold medals at the 1950 World Artistic Gymnastics Championships (all-around) and 1952 Summer Olympics (team portable apparatus). She was the national all-around champion in 1950 and attended the 1956 Olympics as a coach.