Lake Hawdon South Conservation Park is a protected area located in the Australian state of South Australia in the locality of Bray about 280 kilometres (170 mi) south-east of the state capital of Adelaide and about 18 kilometres (11 mi) east of the town of Robe.

[2] The conservation park consists of crown land in Sections 177 and 178 of the cadastral unit of the Hundred of Bray.

It came into existence on 18 February 2010 by proclamation under the National Parks and Wildlife Act 1972.

On the same day, a separate proclamation ensured that “certain existing and future rights of entry, prospecting, exploration or mining” permitted under the state's Petroleum and Geothermal Energy Act 2000 would apply to the extent of the conservation park.

The lake contains extensive areas of sedgelands including species such as Gahnia trifida, Gahnia filum, Baumea arthrophylla, Baumea juncea and Juncus kraussii.