| Tonje Løseth | |
| Nationality: | Norwegian |
| Birth Date: | 1 January 1991 |
| Birth Place: | Bergen, Norway |
| Position: | Left back |
| Currentclub: | Odense håndbold |
| Clubnumber: | 25 |
| Clubs1: | Bønes IL |
| Clubs2: | Årstad IL |
| Years3: | –2010 |
| Clubs3: | TIF Viking |
| Years4: | 2010–2015 |
| Clubs4: | Tertnes HE |
| Years5: | 2015–2017 |
| Clubs5: | TuS Metzingen |
| Years6: | 2017–2020 |
| Clubs6: | Herning-Ikast Håndbold |
| Years7: | 2020–2022 |
| Clubs7: | Brest Bretagne Handball |
| Years8: | 2022– |
| Clubs8: | Odense Håndbold |
| Nationalyears1: | 2013–2017 |
| Nationalteam1: | Norway |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 3 |
Tonje Løseth (born 1 January 1991) is a Norwegian handball player. She plays for the club Odense Håndbold.
In 2015 she signed to play for Tus Metzingen.[1]