Operário Atlético Caarapoense, commonly known as Operário AC, is a Brazilian football club based in Caarapó, Mato Grosso do Sul.

The club competes in the Campeonato Sul-Mato-Grossense Série B, the second division in the Mato Grosso do Sul state football league system.

The club was founded on 3 May 1952, adopting similar logo, team kits and colors as Operário Futebol Clube.

[3] Operário Atlético Clube play their home games at Estádio Francisco Chaves Filho, nicknamed Chavinha, and located in Itaporã.

[5] Until 2009,[4] Operário Atlético Clube played their home games at Estádio Fredis Saldivar, nicknamed Douradão.