1990–91 Primera División de Fútbol Profesional

The 1990–91 Primera División de Fútbol Profesional season is the 39th tournament of El Salvador's Primera División since its establishment of the National League system in 1948. The tournament began August 12, 1990 and ended on June 30, 1991. Luis Angel Firpo won the championship match against Aguila 1-0.

Luis Angel Firpo went 31 games undefeated, the second longest undefeated run at the time. Since that time, Alianza and FAS 33 games in 1977-78 games.

Team name change
Prior to the start of 1990-91 season, Acajutla changed their names to Tiburones FC (the sharks). They also changed their team colour from red to white and orange.

List of foreign players in the league
This is a list of foreign players in 1990-1991. The following players:
 * 1) have played at least one game for the respective club.
 * 2) have not been capped for the El Salvador national football team on any level, independently from the birthplace

C.D. Águila
 * 🇦🇷 Hugo Coria
 * 🇧🇷 Salvador Filho

Alianza F.C.
 * 🇨🇷 Eduardo "Tanque" Ramírez
 * 🇨🇱 Carlos Solar
 * 🇨🇱 Raul Toro
 * 🇺🇾 Gustavo Faral Orange x.svg
 * 🇺🇾 Julio da Rosa

Atletico Marte
 * 🇵🇪 Agustin Castillo
 * 🇵🇪 Miguel Seminario

Cojutepeque
 * 🇵🇦 Carlos Maldonado
 * 🇵🇦 Percival Piggott
 * 🇵🇾 Julio Cesar Chavez

Dragon
 * 🇭🇳 Cipriano Dueñas
 * 🇭🇳 Rafael Argueta
 * 🇺🇾 Gustavo Faral

(player released mid season) (player Injured mid season) Injury replacement player

C.D. FAS
 * 🇵🇦 Erick Ortega
 * 🇺🇾 Daniel Darío López
 * 🇺🇾 Daniel Uberti

C.D. Luis Ángel Firpo
 * 🇧🇷 Toninho Dos Santos
 * 🇧🇷 Nildeson
 * 🇧🇷 Fernando de Moura
 * 🇵🇾 Julio César Chávez

Fuerte San Francisco
 * 🇭🇳 Jorge Tim Martìnez

Metapan
 * 🇭🇳

Tiburones
 * 🇧🇷 Vanderley Ataliba