This is a list of Spanish football transfers for the summer sale in the 2010–11 season of La Liga and Segunda División. Only moves from La Liga and Segunda División are listed.
The summer transfer window opened on 1 July 2010, although a few transfers took place prior to that date. The window closed at midnight on 31 August 2010. Players without a club could have joined one at any time, either during or in between transfer windows. Clubs below La Liga level could also have signed players on loan at any time. If need be, clubs could have signed a goalkeeper on an emergency loan, if all others were unavailable.
The 2010–11 Spanish football season is Real Valladolid's first season in the second level in Spanish football since the historical 2006–07 season, in which the team promoted to La Liga with 88 points. After the salvation attempt of the previous season, Javier Clemente was sacked on 23 June 2010, before the pre-season. Antonio Gómez, Rafael Benítez's former assistant and the former coach of Albacete B, was the new team coach for the 2010–11 season but he was sacked on 29 November 2010 after the defeat against Cartagena in Nuevo José Zorrilla. Javier Torres Gómez was the provisional manager between 29 November and 5 December, earning a point at Barcelona Atlètic's Mini Estadi. After that, Abel Resino was named new team coach in the afternoon of 5 December.
The 2019–20 Deportivo Alavés season was the club's 108th season in existence and the club's 15th season in the top flight of Spanish football. It covered a period from 1 July 2019 to 19 July 2020. Alavés competed in La Liga and Copa del Rey.