The island group is officially designated unallocated Crown land,[3] within the Flinders Municipality in Tasmania and the South Gippsland Shire in Victoria.

The Hogan Group is located 40 kilometres (25 mi) southeast of Wilsons Promontory in the Bass Strait.

Other plants and animals that live on and near the island group include Cystophora intermedia, eelgrass, kelp, and abalone.

[2] During the Pleistocene period, the Hogan Group was part of a land bridge that connected Tasmania to mainland Australia.

[1] Black erred in his initial survey, placing the group further north than they actually are, which led to the Victoria-Tasmania land border on Boundary Islet.