Banksia sect. Eubanksia is an obsolete section of Banksia. There have been two circumscriptions, one of which is synonymous with the recently abandoned B. subg. Banksia sensu Alex George, the other having no modern equivalent.
The name Eubanksia was first published without rank by Stephan Endlicher in 1847. He published it as a replacement name for Robert Brown's Banksia verae, the "true banksias". In Brown's taxonomic arrangement of Banksia, Banksia verae was defined as comprising all species with a typical Banksia flower spike, and thus contained all known species except B. ilicifolia (Holly-leaved Banksia), which was unusual in having domed flower heads. Brown's circumscription of Banksia verae was retained for Eubanksia by Endlicher, and again by Carl Meissner, who gave Eubanksia sectional rank in his 1856 arrangement. Meissner divided B. sect. Eubanksia into four series, on the basis of leaf characters: B. ser. Abietinae, B. ser. Salicinae, B. ser. Quercinae and B. ser. Dryandroideae.
George Bentham published a new arrangement of Banksia in 1870, dividing Banksia into five sections. He appropriated B. sect. Eubanksia for a section containing only B. marginata (Silver Banksia), B. dentata (Tropical Banksia) and B. integrifolia (Coast Banksia), claiming that "the three species here included… are so closely allied and so frequently connected by intermediates, that they might almost be considered as varieties of a single one." Thus Bentham's circumscription was completely unrelated to that of Brown, Endlicher and Meissner.