Cocklebiddy is a small roadhouse community located on the Eyre Highway in Western Australia.

The current business name of the roadhouse is the Wedgetail Inn and, like most other Nullarbor establishments, has access to satellite television, as well as providing caravan park and hotel-motel facilities.

Cocklebiddy started as an Aboriginal mission station, of which only the stone foundations remain today.

[4] A new species in the Restionaceae (a family of tussock-like plants), namely Harperia eyreana, was discovered about 20 km (12 mi) to the south-west of Cocklebiddy, and described in 2000.

In 1995 South Australian cave diver Christopher Brown went another 20 m (66 ft) further again, and in late 2008 much of the cave's more distant regions were explored, mapped (using radio-location "pingers" designed and operated by Ken Smith) and videotaped by Craig Challen and Richard Harris et al using rebreather technology.