1965–66 Primera División de Fútbol Profesional

The 1965–66 Primera División de Fútbol Profesional season is the th tournament of El Salvador's Primera División since its establishment of the National League system in 1948. The tournament began on 19 September 1965 and finished on July 10, 1966. Alianza F.C. secured its first Primera División title.

List of foreign players in the league
This is a list of foreign players in 1965-66 Campeonato. The following players:
 * 1) have played at least one apertura game for the respective club.
 * 2) have not been capped for the El Salvador national football team on any level, independently from the birthplace

ADLER
 * 🇦🇷 Hugo Ponce
 * Tomas Gamboa

C.D. Águila Alianza F.C.
 * 🇧🇷
 * 🇨🇱 Miguel Hermosilla
 * 🇨🇱 Ricardo Sepúlveda
 * Guido Alvarado
 * 🇵🇦 Luis Ernesto Tapia

Atletico Marte
 * 🇦🇷 Juan Andres Rios
 * 🇦🇷 Rodolfo Baello
 * 🇦🇷 Raul Pibe Vasquez
 * Jose Luis Soto

Atlante
 * Rodrigo Gallardo
 * Anrias Ruiz

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

C.D. FAS
 * 🇦🇷 Nelson San Lorenzo
 * 🇦🇷 Hugo Sigliano
 * Adonay Alfaro
 * Carlos Marin
 * Walter Aldana

Juventud Olimpico
 * Roberto Castelli

Once Municipal
 * 🇦🇷 Jorge Alberto Diz
 * 🇦🇷 Oswaldo Crosta
 * Tarcisio Rodríguez
 * Jose Manuel Lopez
 * William Salas
 * Gerardo Alfaro

Quequeisque
 * 🇭🇳

UES
 * Rubén Filomeno
 * Raúl Canario Avellaneda
 * Víctor Viteca Pereira