Unionistas de Salamanca

After UD Salamanca's dissolution, a group of supporters founded Unionistas de Salamanca Club de Fútbol, a fan-based club created mainly to preserve UDS' memory. After the club's creation, famous people like Vicente del Bosque and Dani Rovira became associates. A number of British citizens resident in Spain and England are also members. The fees contributed by the members of the club are a very important part of club's budget. 2,653 people who decided to become partial owners the club, all at individual title, in season 2018–2019. During the first season following its foundation, the club played home games at the “Rosa Colorado” municipal stadium.

On 2 September 2014, Unionistas was inscribed in Primera Provincial de Salamanca, the sixth level of Spanish football. A day later it played its first official match, a 0–1 friendly loss against UD Santa Marta.

Unionistas achieved promotion to Primera Regional in April 2015, after defeating Real Salamanca Monterrey. Just one year later, it was promoted to Tercera División after defeating Onzonilla.

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. The club qualified for a second attempt in the next season, after topping the group 8. This time it achieved promotion by defeating Socuéllamos in the last match, with a penalty kick scored in the 96th minute.

The first season in Segunda Division B was successful, as the team managed to finish in ninth place, avoiding relegation and qualifying for the Copa del Rey the following season.

In their debut in Copa del Rey in 2019, Unionistas reached the round of 32nd after beating Atlético Baleares and Deportivo La Coruña. In that round, they were eliminated by powerhouse Real Madrid, after losing 1–3. In the league, the season was more difficult. After first 11 league games the club was holding 19th position among 20 teams. However, the club avoided relegation after leaving the last positions and following the suspension of the league due to the COVID-19 pandemic.

In the 2023-24 season, the club made it to the round of 32 of the 2023-24 Copa del Rey after beating Gernika, Sporting de Gijón, where the club faced Villarreal on 8 January 2024.

After keeping the score to 0–0, Unionistas eventually conceded to Villarreal attacker Ilias Akhomach, but scored an 87th minute equalizer through an Alfred Planas penalty. The score remained 1–1 even after extra time, and the game went to penalties. However, due to a power outage, the stadium's floodlights failed and the penalty shootout was postponed to the following morning. In the morning's penalty shootout, Unionistas won the match with Adri Gómez scoring the winning penalty. This sent Unionistas to the Round of 16 of the competition, where they would meet FC Barcelona at home, losing 1–3 after taking the lead.