Warramboo (wɔrˑræmˑbʉː) is a locality in the Australian state of South Australia located on the Eyre Peninsula about 334 kilometres (208 mi) north-west of the state capital of Adelaide and about 26 kilometres (16 mi) south-east of the municipal seat of Wudinna.

Warramboo has one of the largest (historical) windmills in the southern hemisphere, located ~10 km west of the township and still present today.

The water from this mill was unfortunately not suitable for people or livestock due to the high salt concentration.

[10] A public school was erected at Warramboo during early European settlement and remained a source of education for children 5–12 years old from 1920 until its closure in 2002.

The company has acquired land for a new deep water port at Cape Hardy on the western shore of Spencer Gulf, which would be connected to Warramboo by a 148 kilometres (92 mi) utilities corridor in which would be a substantial standard gauge heavy haul railway, service road, power line and water pipeline.