Unión Deportiva Las Palmas S.A.D. is a professional football club based in Las Palmas de Gran Canaria, Canary Islands, Spain. The club will compete in Segunda División, the 2nd division in the Spanish football league system onwards of their relegation in La Liga. Nicknamed Los Amarillos, the club was founded on 22 August 1949 as a result of a merger between five clubs in the Canary region. The club initially played in the Estadio Insular before beginning hosting their home matches at the Estadio Gran Canaria in 2003.

Las Palmas have been Segunda División champions four times, in 1953–54, 1963–64, 1984–85 and 1999–2000, and have won the Segunda División B twice, in 1992–93 and 1995–96. They have been runners-up in La Liga once, in 1968–69, and runners-up in the Copa del Rey, in 1977–78. Las Palmas is the only side in Spanish football to achieve back-to-back promotions to La Liga in their first two seasons. They had a 19-year run in the competition, ending in 1982–83 and has been promoted to La Liga on four additional occasions since that time, achieving it recently in 2022–23.

Since its foundation, the club has played with yellow and blue as their primary and secondary colours. They have a fierce rivalry with neighbouring island Tenerife, with whom they contest the Canary Islands derby. The two clubs are among the most isolated professional football clubs in Europe since they play their away games on the distant Spanish mainland.

A decade after the Spanish Civil War, football in Las Palmas faced numerous challenges and difficulties. The financial situations of Las Palmas’ five biggest clubs, Real Club Victoria, Marino FC, CD Gran Canaria, Atlético Club, and Arenas Club, were deteriorating rapidly due to their financial strength of being able to compete for players against Spain's top clubs. A new registration law by the Royal Spanish Football Federation, which limited players to a maximum of a two-year contract, resulted in the clubs in Las Palmas being unable to retain their academy players for extended periods. Consequently, many players relocated to the Spanish mainland to continue their football careers in national competitions. As a result, Eufemiano Fuentes Díaz, president of Marino CF, went to a meeting in Madrid to change the legislation of contracts to a minimum of four years. A different proposal was also presented, stating that all Spanish clubs were prohibited from signing players in the Canary region with the exception if they were first-team players who had already passed the stage of being academy players. These proposals were delayed and denied by the RFEF.

During this time, clubs continued to see their debts increase, leading to the possibility of defunction. The Vice President of the Las Palmas Football Federation, Manuel Rodríguez Monroy, proposed a merger of the five teams comprising the regional competition, aiming to compete in national competitions and resolve the economic situation as a result. The purpose of this proposal was to present a compelling case to the RFEF for allowing the Canary Islands to participate in national competitions, enabling Canarian footballers to compete without relocating to the Spanish mainland. This proposal was presented towards the president, Adolfo Miranda Ortega, who among other board members agreed. On 4 February 1949, a letter was sent to the presidents of the five clubs, proposing a potential merger to compete in the national competitions. The first meeting was held on 28 February 1949 in Alameda de Colón, Las Palmas with the representatives of the five merging clubs attending. Gran Canaria, Atlético and Arenas promptly agreed to the proposal due to their finances whilst Marino and Victoria remained wary of the repercussions it could have on the club and its fans. From there, the representatives agreed to meet every Monday and create a collaborative group that would be known as the Fusion Presentation.

Don José Del Río Amor, of legal age and from this neighborhood, acting as President of the Management Commission of the Club "Unión Deportiva Las Palmas" to that Excma. Corporation that allows exhibiting: That by agreement of the five teams that make up the First Regional Category, dependent on the Regional Football Federation of Las Palmas de Gran Canaria, it has been done with permission to merge them with the objective that, grouped in one only all their potential economically and sportingly, incorporate this powerful Club into national football competitions.

Likewise, and by unanimous agreement of the merged teams, its name is "Unión Deportiva Las Palmas" and that both the colors and the shield of the teams resulting from this merger are those of this city; but for the latter to be legally carried out, it is necessary that the Hon. Corporation gives its approval in this regard, that is why it begs that Excma. Corporation that, having presented this document, deigns to authorize the aforementioned Club "Unión Deportiva Las Palmas" to use the shield of this city, orlando with the name of this Club and the emblems of the five merged teams.

It is grace that you expect from that Excma. Corporation, whose life God save many years.