| Tadej Matijašić | |
| Nationality: | Slovenian |
| Birth Date: | 7 June 1994 |
| Birth Place: | Ljubljana, Slovenia |
| Position: | Left Wing |
| Currentclub: | RD Koper 2013 |
| Clubnumber: | 94 |
| Years1: | 2012–2017 |
| Years2: | 2015–2019 |
| Years3: | 2019– |
| Clubs3: | RD Koper 2013 |
Tadej Matijašić (born 22 January 1994) is a Slovenian handball player who plays for RD Koper 2013.