| Denis Haueisen | |
| Fullname: | Dennis Haueisen |
| Birth Date: | 1978 9, df=yes |
| Birth Place: | Gera, East Germany |
| Discipline: | Road |
| Role: | Rider |
| Amateuryears1: | 2001 |
| Amateurteam1: | Wiesenhof |
| Amateuryears2: | 2002 |
| Amateurteam2: | LTA-Quattro Logistics |
| Amateuryears3: | 2003 |
| Amateurteam3: | Rose Versand-Merlin Logistic |
| Amateuryears4: | 2004–2005 |
| Amateurteam4: | Radshop Haueisen-Thüringen |
| Proyears1: | 2006–2008 |
| Proteam1: | Milram |
Dennis Haueisen (born 13 September 1978 in Gera) is a retired German professional road bicycle racer who was active between 2001 and 2008. He is a son of Lutz Haueisen, amateur cyclist who won two world titles in track events.