It separates Baillie-Hamilton Island (to the north) from Cornwallis Island (to the south).

It is one of the Parry Channel islands off the southwest coast of Cornwallis Island.

Snowblind Bay on Cornwallis Island, to the west, has similar red strata beds.

It runs north/south, separating Cornwallis Island and Devon Island.

After the founding of Halifax in 1749, it was first known as Cornwallis Island.

Cornwallis Island may refer to:

It is located in Parry Channel on the southern side of Cornwallis Island.

Cornwallis Island is to the south, across Maury Channel.

Cornwallis Island is also home to microbiological colonies known as hypoliths, from their tendency to take hold under ("hypo") stones ("lith").

Little Cornwallis Island was the home to Polaris Mine, the most poleward base-metal mine in the world.