| Fullname: | Jörn Andreas Wemmer |
| Birth Date: | 13 May 1984 |
| Birth Place: | Berlin, Germany |
| Height: | 1.83 m |
| Position: | Midfielder |
| Youthyears1: | –2004 |
| Youthclubs1: | SpVg Aurich |
| Years1: | 2004–2005 |
| Clubs1: | SV Meppen |
| Caps1: | 6 |
| Goals1: | 0 |
| Years2: | 2005–2008 |
| Clubs2: | VfL Wolfsburg II |
| Caps2: | 57 |
| Goals2: | 7 |
| Years3: | 2008–2009 |
| Clubs3: | FC Oberneuland |
| Caps3: | 10 |
| Goals3: | 2 |
| Years4: | 2009–2011 |
| Clubs4: | Erzgebirge Aue |
| Caps4: | 12 |
| Goals4: | 0 |
| Years5: | 2011–2012 |
| Clubs5: | Berliner AK |
| Caps5: | 15 |
| Goals5: | 0 |
| Years6: | 2012–2014 |
| Clubs6: | Berliner FC Dynamo |
| Caps6: | 29 |
| Goals6: | 10 |
| Totalcaps: | 129 |
| Totalgoals: | 19 |
Jörn Wemmer (born 13 May 1984) is a German former professional footballer who played as a midfielder. Wemmer played most of his career with a mix of professional and amateur teams from levels 4 through 6, but he did sign with professional Erzgebirge Aue as a backup player for two seasons, appearing in seven matches with them in level 3. Liga, then five matches in level 2. Bundesliga during his second season with the team.
Wemmer is the older brother of footballer Jens Wemmer.
He joined lower-league side in TSG Einheit Bernau in 2016.[1]