Almirante Brown, founded on 14 October 1917, by José Ryan and Stegmann.

Brown won the 1995–96 Torneo Argentino B promoting to the upper division with Mataderos, a club from Necochea.

A year after, on 28 June 1997, the team reached the Primera B Nacional (the second division of the Argentine football league system) later defeating Sportivo Ben Hur 1–0 in Rafaela, Santa Fe Province.

During its debut season in the Primera B Nacional, Brown finished 6th in the first stage but then was relegated to the last position in the B group.

Brown made its best performance in the 2000–01 season, being near to promote to First Division although the team was defeated by San Martín de Mendoza before reaching the semi-finals.