| Ronald Fagundez | |
| Fullname: | Ronald Daian Fagundez Olivera |
| Birth Date: | 12 May 1979 |
| Birth Place: | Montevideo, Uruguay |
| Position: | Midfielder |
| Years1: | 1999–2003 |
| Caps1: | 40 |
| Goals1: | 8 |
| Years2: | 2003–2006 |
| Caps2: | 72 |
| Goals2: | 14 |
| Years3: | 2006–2009 |
| Caps3: | 73 |
| Goals3: | 25 |
| Years4: | 2009–2012 |
| Caps4: | 67 |
| Goals4: | 8 |
| Years5: | 2013–2014 |
| Caps5: | 50 |
| Goals5: | 17 |
| Manageryears1: | 2022– |
| Managerclubs1: | PSM Makassar (Assistant coach) |
| Pcupdate: | September 2014 |
Ronald Daian Fagundez Olivera (born May 12, 1979) is a Uruguayan former footballer who previously played in midfield for PSIS Semarang.