Impulsora del Deportivo Necaxa S.A. de C.V.; often simply known as Club Necaxa, is a Mexican football club in Liga MX based in the city of Aguascalientes. It plays in the Estadio Victoria.

Necaxa was founded on 21 August 1923. It began when Englishman William H. Frasser, an engineer and owner of the Light and Power Company (Compañía de Luz y Fuerza) in the state of Puebla, founded a football team. Frasser, as a student was a football player in the United Kingdom and was a strong advocate for the sport. Frasser consolidated the teams of the Light and Power Company and the Street Car operators Compañia de Luz y Fuerza and Tranvías into one.

Frasser supported the newly merged team with company revenue and funds. In addition, the Light and Power Company offered steady employment to players in an era where half of the players were playing at an amateur level. However, the Mexican football federation did not allow teams to be named after private companies, so the team changed its name to Necaxa, after the Necaxa River that was close to the electrical plant.

In that era, the team was called "Los Electricistas" (The Electricians). The team adopted the colors red and white as their team colors, earning them the nickname "Los roji-blancos". During this period, the oldest rivalry in Mexican football began to form, between Necaxa and Atlante F.C.

During this decade, Necaxa became one of the most popular teams in Mexico. Under the direction of the Ernst Pauler, Necaxa, in one season of play (1935–36), the team dominated and won titles ranging from Champion of Champions, Champion of the Liga Mayor De La Ciudad, National Champion of League, National Champion and Central American Champions. Their last title was the Central American Championship in El Salvador.

"Paco" Martinez de la Vega, an aficionado, would coin the surname for the very first time" Campeonismo" or "Championshipism" in which Necaxa's would later use to justify their achievements and titles.

It obtained the third place in the 2000 FIFA Club World Cup Edition carried out in Brazil, and the seventh place in the list of the International Federation of history and statistics of soccer for the club of the century of North and Central America (1901-2000) being the Mexican club better ranked.