Arenas Club de Getxo is a Spanish football club based in the town of Getxo, near Bilbao, in the autonomous community of Basque Country. Founded in 1914, it currently plays in Tercera División, holding home games at Campo Municipal de Gobela, with a 1,200-seat capacity.

It was among the pioneering clubs of Spanish football, and in 1928 was a founding member of La Liga, alongside neighbouring Athletic Bilbao, Real Sociedad and Real Unión.

Founded in 1909 as Arenas Football Club, it became Club Arenas three years later. In 1914 the club played a series of three friendlies against FC Barcelona, winning all games.

The team subsequently competed in the Campeonato Norte along with Real Sociedad, Athletic Bilbao, Racing de Santander, Sporting de Gijón and Celta de Vigo, being crowned champion in 1917, and qualifying to the Copa del Rey, where it reached the final in Barcelona, losing 1–2 against Madrid FC after extra time.

In 1919, Arenas won another regional competition, the Campeonato de Vizcaya, thus qualifying for the domestic cup again, and winning the tournament after disposing of FC Barcelona in overtime (5–2). The following year, when Spain made its international debut at the Olympic Games in Antwerp, the squad included two players from the club, Francisco Pagazaurtundúa and Félix Sesúmaga.

Getxo (Guecho in Spanish) is a town located in the province of Biscay, in the autonomous community of the Basque Country, in the north of Spain. It is part of the metropolitan area of Bilbao (Greater Bilbao), and has about 83,000 inhabitants. Getxo is mostly an affluent residential area, as well as being the third largest municipality of Biscay.

Getxo was a parish (anteiglesia, elizatea), originally a rural area, including a large beach at the mouth of the Estuary of Bilbao, centered on the little fishing village of Algorta. The parish council met at the church of Getxoko Andra Mari (Basque) or Santa María de Getxo (Spanish) (both mean Our Lady of Getxo), not far from the headland called Punta Galea.

The town's coat of arms has an oak with two cauldrons chained to its branches and the motto Kaltea Dagianak Bizarra Lepoan (Basque for "He who makes evil, the beard at his back").

With industrialisation in the 19th century, some parts of Getxo evolved into residential areas for the rich bourgeois class. A residential area called Neguri (Basque for "Winter Town") came into being. The village of Algorta grew around the church of San Nicolás and the canalisation of the firth, provided for the colonisation of the beach, where a district called Areeta in basque and Las Arenas (Spanish for "The Sands") was built. Near Areeta / Las Arenas, on the other side of the road to Bilbao, there grew a working-class district called Romo, similar to the one that grew near Neguri: Neguri Langile. Finally, in the 20th century, urban development reached the rural areas of Santa María de Getxo.