Investigator Group Conservation Park was a protected area in the Australian state of South Australia located on islands within the Investigator Group of islands off the west coast of Eyre Peninsula about 562 kilometres (349 mi) north-west of the state capital of Adelaide and about 50 kilometres (31 mi) south-west of the town of Elliston.

The islands are granite inselbergs up to 100m above sea level, and some are capped with calcarenite, a rock type of aeolian origin as windblown dunes.

The islands feature precipitous cliffs to 75m tall, deep overhangs, sea caves, crevasses, talus slopes and summit platforms.

Other important landforms within the Group are of marine origin, including old coastal foredune deposits and formations indicating a higher sea level than presently exists… The islands of the Group are some of the most scenically spectacular of all South Australia's offshore islands.

Many birds utilise the Investigator Group islands, which may be significant as intermediate points for birds migrating from Flinders Island to the Australian mainland, or as extended feeding territories for Flinders Island species… Several rare or threatened bird taxa, or species with disjunct populations, utilise the islands for breeding, including osprey (Pandion haliaetus), white-breasted sea-eagle (Haliaeetus leucogaster), cape barren goose (Cereopsis novaehollandiae), white faced storm-petrel (Pelagodroma marina) and short-tailed shearwater (Puffinus tenuirostris)… A small colony of Australian sea-lions (Neophoca cinerea), one of the world's rarest marine mammals, breeds on Ward Island… Groups of the New Zealand fur seal (Arctocephalus forsteri) shelter on the rock platforms of several islands and may breed on them…