Pinkawillinie is a locality in the north of Eyre Peninsula in South Australia. It is a rural grain and grazing area in marginal country near Goyder's Line. It draws its name from the cadastral Hundred bearing the same name which is mostly included in the modern bounded locality, however the locality includes several other Hundreds and the Pinkawillinie Conservation Park.
Settlement in this area was spurred by the completion of the railway line to Port Lincoln, which reached Buckleboo in 1926.
A school was approved in 1929. It was originally intended that the residents would build it with assistance of a loan from the Government, however a poor season meant they were unable to proceed, so a portable building was supplied, and a head teacher announced for 1930. The school is now closed. In the 1950s it was only a junior primary school, with children transported to Kimba for higher primary school.
In November 2015, Pinkiwillinie was identified as one of six sites short-listed for a possible low- and intermediate-level radioactive waste repository in Australia.