Multiple phylogenetic analyses have placed "Paranthodon" in Stegosauria, and often in Stegosauridae. A 2010 analysis including nearly all species of stegosaurians found that "Paranthodon" was outside Stegosauridae, and in a polytomy with "Tuojiangosaurus", "Huayangosaurus", "Chungkingosaurus", "Jiangjunosaurus", and "Gigantspinosaurus". When the latter two genera were removed, "Paranthodon" grouped with "Tuojiangosaurus" just outside Stegosauridae, and "Huayangosaurus" grouped with "Chungkingosaurus" in Huayangosauridae. An elaboration upon this analysis was published in 2017 by Susannah Maidment and Thomas Raven, and it resolved relationships within Stegosauria much more. All taxa were remained included, and "Paranthodon" grouped with "Tuojiangosaurus", "Huayangosaurus" and "Chunkingosaurus" as the most basal true stegosaurians. The position of "Alcovasaurus" was uncertain, and further work could change the result. Below is the analysis.