CD Luis Angel Firpo (W)

On September 17, 1923, a group of Usulután citizens, mostly of European descent, decided to form a team that represented their community's passion for football. The club elected Gustavo Denys as their first club chairman. They decided to choose red and blue as their team's colours. Originally named Tecún Umán, the club was soon renamed in honor of Luis Ángel Firpo, a famous Argentine boxer.

On November 9, 1923, Club Deportivo Sandino, also based in Usulutan, wanted to merge with Firpo, and it almost came to fruition. However, the main sticking point was that Sandino wanted to appoint the majority of the 41 club directors (36 to Sandino and only five Firpo directors). Following the impasse, Firpo rejected the offer. The members of Luis Ángel Firpo later acquired land near Sergio Torres creek to develop and build a stadium.

At the end of 1930s, Former player Miguel el Zancudo Segurado was named football manager, He centred the team around potent players such as Luis Chispo Morataya, Queco Bolanos, Napoleon Flores Huezo, the Zamora brothers (Ricardo and Miguel), the Quinteros brothers (Leonidas and Lázaro), and the Aguila brothers (Ramón and Mario). The most influential player was midfielder Luis Antonio Regalado, who in 1942 become the first player from LA Firpo to represent El Salvador's national team.

On 22 March 1942, Firpo won their first state title for the Zona Oriental (Eastern State), defeating America de Chinameca 2–1. This allowed them to compete in a round robin competition for the national title against Quequeisque (Central State champion), Ferroccarril (Zona Occidente) and Juventud Olímpica. Firpo lost their first match against Quequeisque 6–1, this was followed by a 2–1 win against Ferrocarrill, however Quequeisque won the title due to winning two games and drawing one. Firpo finished in third place.

On 25 April 1943, Firpo won their second Zona Oriental title by defeating Corona (San Miguel) 5–3. Once again Firpo competed in a round robin competition for the national title. In the first game Firpo played against reigning champion Quequeisque were the game was tied for the majority of the game 1-1 thanks to goal from Leonidas Quinteros, Sadly Firpo were not able to hold back the tide and lost the game 8–1. This was followed by 2–2 draw against Ferrocarill, another heavy loss against Quequeisque 7–1, and their only victory in the tournament 2–1 against Ferrocarrill. Firpo once again finished in third place.

Due to World War 2, no state competition or final competition were played, Firpo played a series of friendlies which included 3–2 loss against Quequeisque, 5–0 loss against Espana, 2–1 loss against Mecca, and 1–0 win against Juventud Olímpica.

In 1946, Firpo played their first ever international against Honduran Federal tying 3-3, with all three goals scored by Rafael Galvez.

In 1948, Firpo participated in the first national championship. Firpo played 22 out of 24 games, winning 16 games, drawing 7 games, and losing 6 games with a fifth-place finish. . Firpo didn't play the final two games as Once Municipal were crowned national champion with two games to spare.

The following years were plagued with financial instability, players from the first golden era started retiring or leaving. This culminated with the disastrous 1951-52 Campaign, which included 5–0 loss against Leones, 5–4 loss against Independiente, a stripped 2–1 victory Santa Anita due to players being ineligible, their first victory coming after more than half the season played against Juventud Olímpica; this would be their only victory as they only gained five points and finished last in the league.

After signing Honduran Armando Enamorado and Costa Rican Jacobo Godoy ahead of the 1955–56 season, the club finished runner up by one point to Atletico Marte. In the 1957–58 season Firpo was relegated to the second division after only grabbing 13 points from 20 games.

Firpo hired Former player Narciso Romagoza to coach the team in the second division. Romangoza led the team to the final round robin tournament against El Renacimiento de Santa Ana and Platense. Firpo finished the tournament as champion after winning two games, 1 draw and one loss. This allowed Firpo to be promoted after one season, but the same issues arose with economic problems and players departing, which culminated in Firpo being relegated to second division just two years later.

After being relegated in 1962, The club was stuck in the second division for four years, but in 1967 - thanks to players such as Raul Corcio Zavaleta, and foreign players Andres Paretti & Julio Escobar, Firpo were able to finish in the top spot over historic clubs Dragon, Santa Anita and Rey Y Negro. However the success was short lived as they were relegated just two years later in 1969.

In 1972, Firpo decided to hire more experienced players including 1970 World Cup player Sergio Méndez, Alfredo Erado, Fausto Vasquez and Miguel Miche Cornejo, they once again were able to reach promotion. Although Firpo were technically relegated in 1982, Firpo purchased Agave's first division spot for 25,000 colones and remained in the top division. During this period Firpo were struggling financially off the field and on the field, finishing midtable or in the bottom half of the league.

Following this, Firpo president Gustavo Torres Cerna and nephew Sergio Torres Rivera made a collective, ambitious effort to rebuild the team; he brought quality foreign players such as Guillermo Fisher, Sebastian Pio da Silva, Carlos Lopez Neves and Nelson de Moraes. The latter, along with Francisco Jovel, made Firpo a solid team that was able to consistently qualify for the playoffs during the next five seasons; however, the club's decline in rhythm combined with poor goalscoring in the playoffs prevented them from any real success.

In 1988 nephew Sergio Torres Rivera took over the previous president position, which would begin Firpo's true glory years. Sergio Torres established a robust financial sponsorship, including a renewed partnership with El Salvador conglomerate La Tapachulteca and William Handal. The club would scout promising young players throughout the league such as future captain and national player Leonel Carcamo, Miguel Estrada, Juan Agustin Gamez, and Jose Maria Batres. This was combined with established experienced players such as Giovanni Trigueros, Nelson Rivera, Miguel Arevalo, Mauricio Cienfuegos, and Marlon Menjívar.

Finally they would send scouts down to South America, convincing Peruvian national team players Martín Duffó and Miguel Seminario to sign for the club, later stopping in Brazil to pick up Brazilian pairings Toninho dos Santos and Fernando Da Moura.

In the 1988–89 season, the team hoisted the league title for the first time. The team finished third in the regular season, but the club nonetheless dismissed Argentinian coach Juan Quarterone before the playoffs. In his place, they hired former player Chilean Julio Escobar. Escobar justified the club's faith by leading the team through the championship round and into the finals. Their match against Cojutepeque was drawn 2–2 after extra time, setting up a penalty shootout. Firpo prevailed 4–3, with Leonel Carcamo scoring the winning penalty.

The very next season (1989-90), the club reached their second consecutive final thanks to the efforts of Brazilian Toninho dos Santos, who was the league's topscorer with 25 goals; however, the club lost 3-1 to Alianza.

The following season (1990-91), the team were able to bolster their attack with the addition of Brazilian youngster Nildeson, (who would later be loaned out to Atletico Marte) and the hiring of Uruguayan coach Juan Carlos Masnik. The club went on a 31 match unbeaten streak beginning with a 1-1 draw with FAS in August 1990 and concluding in April 1991 after a 1-0 loss to Tiburones. Salvadoran Keeper Carlos Rivera and Brazilian defender Fernando de Moura had the distinction of participating in every game in the 31 game unbeaten streak. The club also made their biggest transfer in club history when they sold Brazilian Toninho dos Santos, who was the club top-scorer at the time with 11 goals, to Mexican powerhouse Club America for $100,000. Despite the loss of such a great player, the club went on to reach the final, thanks to leading scorer Edgar Henriquez with 12 goals. Firpo went on defeat Aguila 1–0 in the final with Marlon Menjívar scoring the sole goal.

After a successful campaign, Juan Carlos Masnik resigned as coach to return to Uruguay, and the club hired Yugoslavian Kiril Dojčinovski, who played for Yugoslavia in the 1974 World Cup. The club regained Brazilian Nildeson from loan, bought Chilean Raúl Toro and league top scorer Raúl Díaz Arce from Alianza and Dragon respectively, and lastly they promoted Fernando Lazo and Pedro Vasquez from the youth squad. The club lost experience players such as Uruguayans Luis Guelmo and Washington Olivera, and Mauricio Cienfuegos who moved to Mexican club Atlético Morelia. Under the reins of Kiril Dojčinovski, the club won back-to-back championships (1991-92 and 1992-93).

In the 1991-92 season, The club would finish first in the regular season and Quadrangular round; the club's continued dominance happened due to having multiple goal scorers, with Brazilian Fernando de Moura topping the list with 14 goals, followed by compatriot Nildeson with 12 goals, Raúl Díaz Arce with 8 goals, rounding out with Edgar Henriquez and Marlon Menjivar with 7 goals. The club showed their complete dominance in fthe inal, defeating Alianza 3-0 thanks to a double from Nildeson and a goal from Fernando de Moura.

In the 1992-93 season, the club was shocked by the departure of Kiril Dojčinovski during the pre-season, and was replaced by Chilean Hernan Carrasco. With the same squad, the club fell off pace and were behind Alianza and FAS during the final half of rounds, which led to the dismissal Hernan Carrasco. Dojčinovski was rehired and helped to steady the ship, allowing the club to finish second in the regular standings and win the Quadrangular round, which allowed the club to qualify to the final against Alianza. Once again the club would defeat Alianza thanks to goals from Brazilian Celio Rodriguez and Raul Diaz Arce. The club would win their first tri-Championship in their history and first since Atletico Marte who did it previously between the 1955 to 1957 seasons.

In the midst of domestic success, the cub would also prove themselves at the international level, first defeating Italian powerhouse Juventus and Armenia powerhouse Shirak in friendly matches.^[] In the 1995 CONCACAF Cup Winners Cup, the club finished runner-up, losing the final 2-1 to Estudiantes Tecos.

Soon after, Leonel Carcamo donned the captain's armband and the club continued to play at a high level. They reached either the semi-finals or finals every year from 1994 to 1997, then won the championship again in 1998. That win came over FAS 2–0, with the goals being scored by Raúl Toro and Abraham Monterrosa.

Firpo won another championship in Clausura 1999, beating FAS 5–4 on penalty kicks after the game ended 1-1 after extra time. In 2000, club president and owner Sergio Torres died the week before the final match against ADET, and the players dedicated the match to his memory. They went on to win, bringing home their seventh title.

After 2000, Firpo's success began to decline. With players retiring, moving abroad, or being sold onto other clubs, the death of Sergio Torres cost the team their primary sponsor and led the club into financial instability. As a result, Firpo reached the grand final repeatedly, but could not win another title for seven years.

In the 2007 Apertura, Argentinian coach Horacio Cordero guided the team to another final, and they defeated FAS 5–3 in a penalty shootout.

The next season saw the club hoist the crown again, winning the Clausura 2008. They beat FAS again, 1–0,.

The team won their tenth title in the 2013 Clausura under the direction of Argentinian coach Roberto Gamarra with another win over their rivals FAS.

On May 5, 2014, after 32 years of top-flight football, Firpo were relegated to the second division after a 1–1 draw with Dragón. However, the relegation didn't stay, as Firpo purchased Juventud Independiente's license. On May 27, 2019, the club achieved a record sixth relegation from the Primera Division, after the team lost 3–1 against Alianza.

At the end of the 2020 season, Pablo Herrera (owner of the franchise license of Independiente) announced that Independiente will lose their license and he will be giving the license to Luis Angel Firpo for the Clausura 2020.

In September 2023 the club celebrated a centenary of existence with a friendly against Guatemalan giant Municipal, which they lost 1–0.