Athletic Bilbao B
| Full name | Bilbao Athletic | ||
|---|---|---|---|
| Nickname(s) | Los Leones / Lehoiak (The Lions) Los Cachorros / Katxorroak (The Cubs) | ||
| Founded | 1964 | ||
| Ground | Lezama (Field 2) | ||
| Capacity | 3,250 | ||
| Chairman | Jon Uriarte | ||
| Manager | Jokin Aranbarri | ||
| League | Primera Federación – Group 1 | ||
| 2024–25 | Primera Federación – Group 1, 7th of 20 | ||
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Athletic Club "B", officially Bilbao Athletic, is the reserve team of Athletic Club, a football club based in Bilbao, in the autonomous community of Basque Country in Spain. The team currently compete in the Primera Federación – Group 1. Founded in 1964, the team holds home matches at the small stadium attached to the club's training facility at Lezama, holding 3,250 spectators or occasionally at San Mamés Stadium, with its 53,500-seat capacity, for important fixtures.
Reserve teams in Spain play in the same football pyramid as their senior team rather than a separate league. However, reserves cannot play in the same division as their senior team. Therefore, Bilbao Athletic are ineligible for promotion to La Liga. Reserve teams are also no longer permitted to enter the Copa del Rey. In addition, only under-23 players, or under-25 with a professional contract, can switch between senior and reserve teams. In recent years, most of Bilbao Athletic's players have been graduates from the club's youth setup ('cantera') via the feeder team, Basconia. As a result of Athletic's signing policy, only Basque players feature also for the reserve team.