Long Plains is a rural locality and small township on the northern Adelaide Plains in South Australia, 76.8 kilometres (47.7 miles) by road north of Adelaide.

[2][4] Long Plains is on the Adelaide-Port Augusta railway line, between Mallala and Bowmans.

The Long Plains Memorial Hall, built in 1923, commemorates the lives of four local residents who died in World War I.

[9][10] Long Plains Church of Christ opened in 1903, was destroyed in a severe bushfire in 1948, was rebuilt in 1953 and closed in 1981.

The Viterra wheat and barley silos were demolished in October 2022, leaving only the water tower to stand out above the plains.