Founded in 1925, it currently plays in Primera Federación – Group 1, holding home games temporarily at the Lezama Facilities outside Bilbao (its own ground Campo Municipal de Urritxe was not approved for use at that level).

Despite finishing second, Amorebieta clinched the first promotion of its history, rising one step inside the Biscayan Regional category to play, the next year, in the Preferente C division.

In 1962–63, Amorebieta played in the semi-finals of the Spanish Amateur Championship[1] against Real Madrid's farm team, losing 0–2 in Vallecas and managing a 2–2 draw in the second leg, thus being eliminated.

[4] Immediately they faced their first problem of where to play, as their basic Urritxe ground did not meet requirements by several measures and would be prohibitive to upgrade, and none of the possible options, including Ipurua in Eibar and Lezama outside Bilbao, was an ideal solution.

[8] In September 2021, shortly after the B-team returned to action after one year of inactivity, a second reserve team called SD Amorebieta C was incorporated into the club's structure.