Founded on 31 January 1938 as
Automóvel Esporte Clube, the club was renamed
Fluminense Esporte Clube in 1948 as the state already had a
Flamengo and a
Botafogo. 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. The club attempted a return to the second level in 2019, but gave up from playing shortly after, only returning in 2020 and winning the second division. In the 2021
Campeonato Piauiense, Fluminense reached the finals but lost the title to
Altos. In 2022, the club won their first ever Piauiense title, after defeating
Parnahyba in the finals. ==Honours==