Berkley Island is an island, 1 km long, which marks the north-eastern end of the Swain Islands. It was first mapped from air photos taken by U.S. Navy Operation Highjump, 1946–47, and was included in a survey of the Swain Islands in 1957 by Wilkes Station personnel under Carl R. Eklund. It was named by Eklund for Richard J. Berkley, a geomagnetician with the US-IGY wintering party of 1957 at Wilkes Station.