| Mantas Šernius | |
| Width: | 220px |
| Position: | Head coach |
| League: | LKL |
| Team: | CBet Jonava |
| Birth Date: | 1983 6, df=yes |
| Birth Place: | Šilutė, Lithuania |
| Nationality: | Lithuanian |
| Coach Start: | 2008 |
| Cyears1: | 2008–2009 |
| Cteam1: | BC Šiauliai (assistant) |
| Cyears2: | 2009–2010 |
| Cteam2: | TEO Vilnius (assistant) |
| Cyears3: | 2010 |
| Cteam3: | TEO Vilnius |
| Cyears4: | 2010–2012 |
| Cteam4: | VIČI-Aistės Kaunas |
| Cyears5: | 2013–2014 |
| Cteam5: | Pieno žvaigždės Pasvalys (assistant) |
| Cyears6: | 2014–2016 |
| Cteam6: | Pieno žvaigždės Pasvalys |
| Cyears7: | 2016–2018 |
| Cteam7: | Shanxi Flame |
| Cyears8: | 2018–2019 |
| Cteam8: | BC Žalgiris-2 |
| Cyears9: | 2019–2021 |
| Cteam9: | CBet Prienai |
| Cyears10: | 2021–2022 |
| Cyears11: | 2022–2024 |
| Cteam11: | Prometey (assistant) |
| Cyears12: | 2024–present |
| Cteam12: | CBet Jonava |
| Highlights: | As head coach:
As assistant coach:
|
| Mantas Šernius | |
| Position: | Forward |
| Years1: | 1999–2002 |
| Clubs1: | FK Šilutė |
| Goals1: | 18 |
| Years2: | 2002 |
| Clubs2: | FK Inkaras Kaunas |
| Caps2: | 27 |
| Goals2: | 7 |
| Years3: | 2003–2004 |
| Clubs3: | FK Atlantas |
| Caps3: | 47 |
| Goals3: | 7 |
| Years4: | 2003 |
| Clubs4: | → FK Atlantas-2 (loan) |
| Goals4: | 3 |
Mantas Šernius (born 29 June 1983) is a Lithuanian professional basketball coach who is currently the head coach for CBet Jonava of the Lithuanian Basketball League (LKL). Šernius is also the head coach of the Lithuania women's national basketball team.
On 1 July 2022, Šernius signed as an assistant coach with Ukrainian club Prometey, working under head coach Ronen Ginzburg.[1] He re-signed with the team on 16 May 2023.[2]
On 15 July 2024, Šernius was named as the head coach of CBet Jonava of the Lithuanian Basketball League (LKL).[3]