Freycinet Commonwealth Marine Reserve is a 57,942 km2 marine protected area within Australian waters located off the east coast of Tasmania.

It extends to the outer limits of the Australian exclusive economic zone in the Tasman Sea.

Several large offshore seamounts believed to be too deep to have been fished are within the reserved area.

Seamounts generally host a wide variety of habitats that support deep ocean biodiversity, the large seamounts to the east of Tasmania are individually important, as they are expected to include endemic species.

The shallower regions of the reserve includes habitat important to seabirds.