| Janek Sternberg | |
| Birth Date: | 1992 10, df=yes |
| Birth Place: | Bad Segeberg, Germany |
| Height: | 1.82 m |
| Position: | Left-back |
| Currentclub: | VfB Lübeck |
| Clubnumber: | 37 |
| Youthyears1: | 1996–2006 |
| Youthclubs1: | Leezener SC |
| Youthyears2: | 2006–2007 |
| Youthclubs2: | SV Eichede |
| Youthyears3: | 2007–2011 |
| Youthclubs3: | Hamburger SV |
| Years1: | 2011–2013 |
| Caps1: | 66 |
| Goals1: | 3 |
| Clubs1: | Hamburg II |
| Years2: | 2011–2013 |
| Caps2: | 0 |
| Goals2: | 0 |
| Clubs2: | Hamburg |
| Years3: | 2013–2017 |
| Caps3: | 47 |
| Goals3: | 4 |
| Clubs3: | Werder Bremen II |
| Years4: | 2014–2017 |
| Caps4: | 25 |
| Goals4: | 0 |
| Clubs4: | Werder Bremen |
| Years5: | 2017–2018 |
| Caps5: | 16 |
| Goals5: | 1 |
| Clubs5: | Ferencváros |
| Years6: | 2018–2020 |
| Caps6: | 39 |
| Goals6: | 1 |
| Clubs6: | 1. FC Kaiserslautern |
| Years7: | 2020–2022 |
| Caps7: | 64 |
| Goals7: | 0 |
| Clubs7: | Hallescher FC |
| Years8: | 2023– |
| Caps8: | 33 |
| Goals8: | 1 |
| Clubs8: | VfB Lübeck |
| Nationalyears1: | 2009 |
| Nationalteam1: | Germany U18 |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 0 |
| Club-Update: | 22 May 2024 |
| Nationalteam-Update: | 1 July 2019 |
Janek Sternberg (born 19 October 1992) is a German professional footballer who plays as a left-back for VfB Lübeck.
Sternberg joined Werder Bremen in 2013 from Hamburger SV. After initially playing matches with Werder's reserve team, he made his first team debut in a Bundesliga game against SC Paderborn 07 on 29 November, 2014. He played the full game in a 4–0 home win.[1]
On 21 January, 2017, Sternberg joined Ferencváros.[2]
In May 2018, 1. FC Kaiserslautern, newly relegated to the 3. Liga, announced Sternberg would join for the 2018–19 season, having agreed a contract until 2021.[3]
On 31 January, 2020, Sternberg joined Hallescher FC on a deal lasting until the summer of 2021.[4]
Free agent Sternberg moved to VfB Lübeck, which placed first in the Regionalliga Nord, in January 2023.[5] He signed a one-year contract with the option of another year.[5]
Sternberg is a youth international for Germany at the U18 level.[6]