RSC Internacional Fútbol Club, was a Spanish football club based in Madrid, in the autonomous community of Madrid. Founded in 1973, it was the second reserve team of Real Madrid CF for the 2022–23 season.
Founded in 1973 as Club Deportivo San Ignacio de Loyola, the club changed name to Club Flat International in 2020. In 2021, after achieving a first-ever promotion to Preferente de Madrid, the club was again renamed, now into RSC Internacional Fútbol Club.
RSC Internacional finished first in their Preferente group, and achieved promotion to Tercera División RFEF. In July 2022, newspaper announced that Real Madrid reached an agreement with the club to make Internacional their C-team for the 2022–23 season. In August, the new structure started having former Spanish international Luis García as manager, but with Internacional acting as an independent team from Real Madrid to avoid legal issues.
RSC Internacional gave away their place in the 2023–24 Tercera Federación to Real Madrid C, after the side went back to an active status.