Founded on 31 January 1938 as Automóvel Esporte Clube,[1] the club was renamed Fluminense Esporte Clube in 1948 as the state already had a Flamengo and a Botafogo.

[2] The club won the second division in 1967, and played senior football until 1977.

Fluminense returned to senior competitions in 2003, playing one second division before being again exclusive to the youth categories.

[4] In the 2021 Campeonato Piauiense, Fluminense reached the finals but lost the title to Altos.

[5] In 2022, the club won their first ever Piauiense title, after defeating Parnahyba in the finals.