Isles of St Francis Conservation Park was a protected area in the Australian state of South Australia located on islands within the Isles of St Francis 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 Ceduna.

[2][6] The conservation park consisted of land on ten (sic) islands within the Isles of St Francis which form the south-westerly extension of the Nuyts Archipelago.

This island also supports a population of the carpet snake (Morelia spilota), which is vulnerable in South Australia and in decline throughout its mainland range.

Significant breeding colonies of Australian sea lion (Neophoca cinerea), one of the rarest marine mammals in the world, occur on Fenelon and West Islands… St Francis granite formation outcrops on eastern St Francis Island and this is a type locality… The Isles also support a large breeding population of short tailed shearwaters (Puffinus tenuirostris).

The vegetation on the larger islands consists mostly of coast saltbush (Atriplex cinerea) shrubland on the low-lying areas, with grassland and scattered low shrubs covering the remainder.

Other birds which breed on the Isles include Cape Barren goose (Cereopsis novaehollandiae), banded rail (Rallus philippensis), rock parrot (Neophema petrophila) and little penguin (Eudyptula minor).