| Jennifer Janiska | |
| Nationality: | German |
| Birth Date: | 5 April 1994 |
| Birth Place: | Nordhorn, Germany |
| Weight: | 64kg (141lb) |
| Spike: | 298cm (117inches) |
| Block: | 288cm (113inches) |
| Position: | Outside hitter |
| Currentclub: | Dresdner SC 1898 |
| Currentnumber: | 6 |
| Years1: | 2009-2010 |
| Team1: | SCU Emlichheim |
| Years2: | 2010-2013 |
| Team2: | VCO Berlin |
| Years3: | 2013-2014 |
| Team3: | Rote Raben Vilsbiburg |
| Years4: | 2014-2019 |
| Team4: | SSC Palmberg Schwerin |
| Years5: | 2019-2020 |
| Team5: | Imoco Volley Conegliano |
| Nationalyears: | 2013–2022 |
Jennifer Janiska (5 April 1994 in Nordhorn née Jennifer Geerties) is a German former professional volleyball player. She was the captain of the Germany women's national volleyball team[1] who won the silver medal at the 2013 European Championships with the national team. At club level, Janiska won the world title with Imoco Volley Conegliano in 2019.[2]