| Francisco Nazareno | |
| Fullname: | Francisco Efren Nazareno Mercado |
| Birth Date: | 13 December 1993 |
| Birth Place: | Guayaquil, Ecuador |
| Position: | Centre midfielder |
| Currentclub: | Barcelona |
| Clubnumber: | 27 |
| Youthyears1: | 2008– - |
| Youthclubs1: | Barcelona |
| Youthyears2: | 2009 |
| Youthclubs2: | Independiente José Terán |
| Youthyears3: | 2010 |
| Youthclubs3: | Deportivo Quito |
| Years1: | 2010 |
| Clubs1: | Deportivo Quito |
| Caps1: | 3 |
| Goals1: | 0 |
| Years2: | 2011 - |
| Clubs2: | Barcelona |
| Caps2: | 1 |
| Goals2: | 0 |
| Club-Update: | January 30, 2011 |
Francisco Efren Nazareno Mercado (born December 13, 1993) is an Ecuadorian footballer. He currently plays midfield for Barcelona.