Nene Valley Conservation Park is a protected area in the Australian state of South Australia located in the localities of Blackfellows Caves and Nene Valley in the state's south-east about 35 kilometres (22 miles) south west of the municipal seat of Mount Gambier and about 18 kilometres (11 miles) west north west of Port MacDonnell.

[2][5] The conservation park was proclaimed under the National Parks and Wildlife Act 1972 on 14 December 1972.

[3] In 1980, the following state of significance was published: Nene Valley Conservation Park preserves an area of vegetation typical of sandy coasts in the south-east of South Australia.

This vegetation complex has suffered through the effects of clearing and grazing throughout much of its former range.

[6]The conservation park is classified as an IUCN Category III protected area.