Olive Island Conservation Park is a protected area in the Australian state of South Australia associated with Olive Island off the west coast of Eyre Peninsula and which is located about west-northwest of the town of Streaky Bay.
The land under protection was declared as a fauna conservation reserve under the Crown Lands Act 1929 on 16 March 1967. The fauna conservation reserve was re-proclaimed as the Olive Island Conservation Park in 1972 under the National Parks and Wildlife Act 1972 on 27 April 1972 to "conserve a significant Australian sea lion breeding habitat". On 19 December 1991, additional land was added to the conservation park. As of 2018, it covered an area of .
The conservation park is classified as an IUCN Category Ia protected area. In 1980, the conservation park was listed on the former Register of the National Estate.