| Diego Quintanilla | |
| Fullname: | Diego Mauricio Quintanilla Ribadeneira |
| Birth Date: | 2 February 1991 |
| Birth Place: | Quito, Ecuador |
| Position: | Midfielder |
| Currentclub: | Alianza Cotopaxi |
| Youthyears1: | 2004–2010 |
| Youthclubs1: | LDU Quito |
| Years1: | 2010–2012 |
| Clubs1: | LDU Quito |
| Caps1: | 2 |
| Goals1: | 0 |
| Years2: | 2011–2012 |
| Clubs2: | → Aucas (loan) |
| Caps2: | 57 |
| Goals2: | 10 |
| Years3: | 2013 |
| Clubs3: | FC UIDE |
| Caps3: | 13 |
| Goals3: | 7 |
| Years4: | 2013–2014 |
| Clubs4: | Aucas |
| Caps4: | 17 |
| Goals4: | 2 |
| Years5: | 2015–2016 |
| Clubs5: | ESPOLI |
| Caps5: | 35 |
| Goals5: | 2 |
| Years6: | 2017– |
| Clubs6: | Alianza Cotopaxi |
| Caps6: | 7 |
| Goals6: | 1 |
| Club-Update: | August 12, 2017 |
Diego Mauricio Quintanilla Ribadeneira (born February 2, 1991) is an Ecuadorian footballer who plays for Alianza Cotopaxi. A product of LDU Qutio's youth system, he earned his first senior cap on June 12, 2010 in the clasico capitalino against crosstown-rival Deportivo Quito.