[1] The club has participated in the South Australian Amateur Football League since being formed.

Portland Football Club was formed in 1997 from a merger of Alberton United, Ethelton and Riverside.

[5] In 1941, they went into recess due to World War II,[6] before returning to the SAAFL in 1946.

When the PADFA folded in 1952, Ethelton transferred to the West Torrens District Football Association until it joined the South Australian Amateur Football League (SAAFL) in 1956,[16] where it remained until it entered a merger in 1997 with Alberton United and Riverside to form Portland.

In 1949, Riverside joined the South Australian Amateur Football League[22] where it remained until it merged with Alberton United and Ethelton in 1997 to form Portland.