| Mario Aguilar | |
| Fullname: | Mario Edgardo Aguilar Posadas |
| Birth Date: | 31 July 1984 |
| Birth Place: | Metapán, El Salvador |
| Currentclub: | Isidro Metapán |
| Clubnumber: | 8 |
| Position: | Defender, Midfielder |
| Years1: | 2001–2012 |
| Clubs1: | Isidro Metapán |
| Years2: | 2012 |
| Clubs2: | C.D. Titan |
| Nationalyears1: | 2008 |
| Nationalteam1: | El Salvador |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
| Ntupdate: | 3 October 2010 |
Mario Edgardo Aguilar Posadas (born July 31, 1984 in Metapán) is a Salvadoran footballer who currently plays for Isidro Metapán in the Primera División de Fútbol de El Salvador.
A holding midfielder or central defender, Aguilar has played his entire football career for his hometown club Isidro Metapán.
Aguilar made his debut for El Salvador as a late substitute in an October 2008 FIFA World Cup qualification match against Haiti which proved to be his only international up until October 2010.