| Sebastian Frandsen | |
| Nationality: | Danish |
| Birth Date: | 24 May 1994 |
| Birth Place: | Aarhus, Denmark |
| Position: | Goalkeeper |
| Currentclub: | Fredericia HK |
| Clubnumber: | 1 |
| Years1: | –2014 |
| Clubs1: | Vejle Håndbold |
| Years2: | 2014–2016 |
| Clubs2: | Ribe-Esbjerg HH |
| Years3: | 2016–2018 |
| Clubs3: | Bjerringbro-Silkeborg |
| Years4: | 2018–2021 |
| Clubs4: | TTH Holstebro |
| Years5: | 2021–2023 |
| Clubs5: | FC Porto |
| Years6: | 2023– |
| Clubs6: | Fredericia HK |
| Nationalteam1: | Denmark |
| Nationalcaps1: | 6 |
| Nationalgoals1: | 1 |
Sebastian Leth Frandsen (born 24 May 1994) is a Danish handball player who plays for Fredericia HK.
He won the 2013 Men's Youth World Handball Championship along the Danish youth national team, defeating Croatia 32–26 in OT.[1]
He joined Ribe-Esbjerg HH on a two-year contract, starting at the begin of the 2014–15 season after being without a club due to Vejle Håndbold bankruptcy.
Bjerringbro-Silkeborg announced on September 26, 2015, that Sebastian Frandsen would be joining the club at the start of the 2016/2017 season. Frandsen signed a three-year deal with the club.[2]
TTH Holstebro announced on October 18, 2017, that Sebastian Frandsen would be joining the club at the start of the 2018/2019 season. Frandsen signed a three-year deal with the club.[3]
Frandsen played for FC Porto Handball for 2 years, where he won the Portoguese league and played in the EHF Champions League.[4]