| Karl Wallinius | |
| Fullname: | Karl Erik Edvin Wallinius |
| Birth Date: | 14 January 1999 |
| Birth Place: | Lund, Sweden |
| Nationality: | Swedish |
| Height: | 1.99 m |
| Position: | Left back |
| Currentclub: | THW Kiel |
| Clubnumber: | 49 |
| Youthyears1: | –2016 |
| Youthclubs1: | Lugi HF |
| Years1: | 2016–2021 |
| Clubs1: | Lugi HF |
| Years2: | 2021–2022 |
| Clubs2: | Montpellier Handball |
| Years3: | 2022– |
| Clubs3: | THW Kiel |
| Nationalyears1: | 2021– |
| Nationalteam1: | Sweden |
| Nationalcaps1: | 19 |
| Nationalgoals1: | 21 |
Karl Erik Edvin Wallinius (born 14 January 1999) is a Swedish professional handball player for THW Kiel and the Swedish national team.[1]