 "Banksia epica" is known only from two populations in eastern parts of the Esperance Plains region of the South West Botanical Province, near the western edge of the Great Australian Bight.The main population occurs about 30 kilometres (20 mi) west of Point Culver; there were over 2000 plants there when surveyed in June 1989.A smaller population occurs about 70 kilometres (45 mi) further east at Toolinna Cove; when surveyed in August 1991, this locality had around 350 plants.