Founded in 1990, they last played in Tercera División – Group 14 when dissolved in 2013, and hosted games at the Estadio Romano.

Founded in 1990 as Mérida Promesas after the merge of Santa Eulalia and Los Milagros, the club was affiliated to CP Mérida until 2000, changed its name to Unión Deportiva, going on to take Club Polideportivo's place as the main team in the city.

Having played mainly in the fourth division as a backup team, it did manage seven presences in the third independently, but returned to Tercera in 2009,[1] where it played until being dissolved and replaced by new creation team Mérida AD.

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

Mérida played its home games at Estadio Romano, with a capacity of 14,600 spectators.