Founded in 2013, the club plays in Primera Federación – Group 1, holding home games at Campo de Fútbol Municipal Reina Sofía with a 4895-seat capacity.

[7] On 2 September 2014, Unionistas was inscribed in Primera Provincial de Salamanca, the sixth level of Spanish football.

The first season of the club in Tercera division was successful, as it ended in the third position of the Castile and León group and qualified to the promotion play-offs to Segunda División B.

This time it achieved promotion by defeating Socuéllamos in the last match, with a penalty kick scored in the 96th minute.

In their debut in Copa del Rey in 2019, Unionistas reached the round of 32nd after beating Atlético Baleares and Deportivo La Coruña.

[14] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.