1920–1956: From the origins of football in the city to the foundation of Córdoba C.F. and the first promotion to the Second Division.
In the early 1940s, Club Deportivo Córdoba was founded, which, along with San Álvaro, would become the origin of Córdoba Club de Fútbol in 1954. In the 1953–54 season, both Córdoba clubs were playing in the Third Division: Club Deportivo San Álvaro had just been promoted from the Regional league, and Real Club Deportivo Córdoba had just been relegated from the Second Division. Their coincidence in the same division sparked football debates in the city, especially on Calle de la Plata, where the green-and-white team’s headquarters were located.
From the hot summer of 1954 (specifically August 6 of that year), a new club began its sporting journey: Córdoba Club de Fútbol. The merger of CD San Álvaro and Real CD Córdoba took place through the acquisition of the federation rights of the city's oldest club, after a series of financial and sporting setbacks suffered by Deportivo.
The first president of the newly founded Córdoba CF was Enrique Puga, who later became the provincial delegate of the Andalusian Football Federation. The coach appointed was Arcadio Martínez from Málaga, who had excelled with several Andalusian clubs. He brought several players from Málaga, such as goalkeeper Milanés, midfielder Botana, and forwards Espinoso and Martínez-Invernón. They were joined by Córdoba-born players from CD San Álvaro like Manolín Jiménez, Mariscal, Joaquín, José María… The squad was made up of 19 players.
The 1954–55 season was divided into two phases: in the first, the new Córdoba CF finished fourth, which forced them to play in the relegation phase, where they reached seventh place with seven victories.
The 1955–56 season was a complete success under the presidency of Alfonso Cruz Conde. The "Operation 10,000 Members" was launched, to which the city responded enthusiastically, and the objectives were achieved. With a prestigious board, a young coach like Pepe Juncosa making his professional football debut, and smart signings, Córdoba finally achieved promotion to the second tier of Spanish football. The date was April 22, 1956.
The base lineup of that triumphant season was: Sánchez-Rojas; Navarro, José Luis, Alfaro; Luisito, Mújica; Gelo, Quintín, Araujo, Hermida, and Fustero. The top scorer was Uribarren with 29 goals, despite only playing three promotion phase matches (against Iliturgi and Bastetano, he scored four goals in each match).