| Thomas Nentwich | |
| Birth Date: | 1975 12, df=yes |
| Birth Place: | Austria |
| Position: | Defender |
| Years1: | –1995 |
| Clubs1: | SV Würmla |
| Years2: | 1995–2000 |
| Clubs2: | FCN St. Pölten |
| Caps2: | 134 |
| Goals2: | 4 |
| Years3: | 2000–2005 |
| Clubs3: | SV Ried |
| Caps3: | 112 |
| Goals3: | 11 |
| Years4: | 2005–2009 |
| Clubs4: | SKN St. Pölten |
| Caps4: | 84 |
| Goals4: | 7 |
| Manageryears1: | 2011–2012 |
| Manageryears2: | 2013 |
| Managerclubs1: | SV Würmla |
| Managerclubs2: | SKN St. Pölten (interim) |
Thomas Nentwich (born 22 December 1975) is a retired Austrian football player and a football manager.