| Leonard Nienhuis | |
| Fullname: | Leonard Nienhuis |
| Birth Date: | 16 March 1990 |
| Birth Place: | Groningen, Netherlands |
| Height: | 1.84m (06.04feet) |
| Position: | Goalkeeper |
| Youthyears1: | –2009 |
| Youthclubs1: | SC Cambuur |
| Youthyears2: | 2009–2013 |
| Youthclubs2: | FC Groningen |
| Years1: | 2010–2013 |
| Caps1: | 0 |
| Goals1: | 0 |
| Clubs1: | FC Groningen |
| Years2: | 2011–2012 |
| Caps2: | 34 |
| Goals2: | 0 |
| Clubs2: | → SC Veendam (loan) |
| Years3: | 2012–2013 |
| Caps3: | 8 |
| Goals3: | 0 |
| Clubs3: | → SC Cambuur (loan) |
| Years4: | 2013–2017 |
| Caps4: | 104 |
| Goals4: | 0 |
| Clubs4: | SC Cambuur |
| Years5: | 2017–2018 |
| Caps5: | 2 |
| Goals5: | 0 |
| Clubs5: | Sparta Rotterdam |
| Nationalyears1: | 2010 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
Leonard Nienhuis (born 16 March 1990) is a former Dutch footballer who played as a goalkeeper. He formerly played for FC Groningen, SC Veendam and SC Cambuur.
Nienhuis is a one-time youth international for the Netherlands national under-21 football team on 17 November 2010.[1]