Founded in 1916, it plays in Tercera Federación – Group 2, holding home games at Les Caleyes ground with a capacity of 3,000.

[3] Founded in 1916 by a group of young people at the Worker's Athenaeum, Lealtad played in regional leagues until 1990, when it was promoted for the first time to Tercera División.

[5] On 24 October 2018, Lealtad achieved their first Asturian Copa Federación by defeating Sporting de Gijón B after a penalty shootout.

The record attendance was beaten on 24 April 2016, with 4,052 spectators at the club's match of the 2015–16 Segunda División B against Racing de Santander.

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