Logan Lagoon is a 2172 ha wetland Conservation Area on Flinders Island, the largest of the Furneaux Group at the eastern end of Bass Strait, which is part of the Australian state of Tasmania.
The lagoon area was declared a wildlife sanctuary in 1968, with additional blocks of adjacent land added subsequently.
[2] Logan Lagoon is a coastal wetland complex at the south-eastern corner of Flinders Island, lying some 5 km east of the village of Lady Barron.
Where the land is largely protected from bushfires there is a mixture of forest and scrub dominated by Smithton peppermint, tea-tree, silver banksia and Oyster Bay pine.
Around the lagoon margins are patches of golden speargrass, coastal tussock grassland, salt-tolerant herbs and samphire.