| Rainer Bieli | |
| Fullname: | Rainer Bieli |
| Birth Date: | 22 February 1979 |
| Birth Place: | Kestenholz, Switzerland |
| Position: | Forward |
| Years1: | 1995–97 |
| Years2: | 1997–98 |
| Years3: | 1998–00 |
| Years4: | 2000–01 |
| Years5: | 2001–02 |
| Years6: | 2002–07 |
| Years7: | 2007 |
| Years8: | 2007–2009 |
| Years9: | 2009–2011 |
| Years10: | 2011–2014 |
| Clubs1: | Grasshopper-Club Zurich |
| Clubs2: | FC Baden |
| Clubs3: | Neuchâtel Xamax |
| Clubs4: | Grasshopper-Club Zurich |
| Clubs5: | FC St Gallen |
| Clubs6: | FC Aarau |
| Clubs7: | Neuchâtel Xamax |
| Clubs8: | FC Concordia Basel |
| Clubs9: | FC Winterthur |
| Clubs10: | FC Baden |
| Caps1: | 2 |
| Caps2: | 20 |
| Caps3: | 36 |
| Caps4: | 18 |
| Caps5: | 32 |
| Caps6: | 128 |
| Caps7: | 13 |
| Caps8: | 33 |
| Caps9: | 57 |
| Caps10: | 54 |
| Goals1: | 0 |
| Goals2: | 12 |
| Goals3: | 22 |
| Goals4: | 2 |
| Goals5: | 1 |
| Goals6: | 38 |
| Goals7: | 4 |
| Goals8: | 17 |
| Goals9: | 22 |
| Goals10: | 23 |
| Nationalyears1: | ?–2002 |
| Nationalteam1: | Switzerland U-21 |
| Pcupdate: | 7 March 2008 |
| Ntupdate: | 28 July 2006 |
Rainer Bieli (born 22 February 1979) is a former footballer from Switzerland who last played as forward for FC Baden in the Swiss First League.