| Jannis Heuer | |
| Birth Date: | 29 July 1999 |
| Birth Place: | Burgwedel, Germany |
| Height: | 1.89 m[1] |
| Position: | Defender |
| Currentclub: | 1. FC Kaiserslautern |
| Clubnumber: | 24 |
| Youthyears1: | –2014 |
| Youthclubs1: | Hannover 96 |
| Youthyears2: | 2014–2018 |
| Youthclubs2: | VfL Wolfsburg |
| Years1: | 2018–2021 |
| Clubs1: | VfL Wolfsburg II |
| Caps1: | 24 |
| Goals1: | 4 |
| Years2: | 2021–2024 |
| Clubs2: | SC Paderborn |
| Caps2: | 63 |
| Goals2: | 5 |
| Years3: | 2024– |
| Clubs3: | 1. FC Kaiserslautern |
| Caps3: | 0 |
| Goals3: | 0 |
| Club-Update: | 23 May 2024 |
Jannis Heuer (born 29 July 1999) is a German professional footballer who plays as a defender for 1. FC Kaiserslautern in the .
Heuer was born in Burgwedel.[2] After playing youth football for Hannover 96, he switched to VfL Wolfsburg in 2014.[3] He made his senior debut for VfL Wolfsburg II on 9 December 2018 in a 6–1 win over Eintracht Norderstedt.[4] In total, he scored four goals in 24 appearances for Wolfsburg II. He joined SC Paderborn on a two-year contract in July 2021. He made his debut for SC Paderborn on 24 July 2021 when he was named in the starting eleven for a 0–0 2. Bundesliga draw with 1. FC Heidenheim.[5] In March 2023, he extended his contract with the club.[6]
On 10 June 2024, Heuer joined fellow 2. Bundesliga club 1. FC Kaiserslautern.[7]