Although there is no record directly identifying the compilers, the names of persons cited as having participated in the compilation of the extraordinary volumes include FUJIWARA no Tokihira, Sadaijin (minister of the left), serving as the editor-in-chief, FUJIWARA no Sadakuni (Dainagon (chief councilor of state) and Ukone no Taisho or the Chief of Ukonefu, (Guard Department)), Kiyotsura MIYOSHI, Monjo-hakase (teacher of Chinese poetry and history under the Ritsuryo system), Haruyuki OKURA (Minbutaifu, executive officer of the Ministry of Popular Affairs) and FUJIWARA no Yoshitsune, (Myoho-hakase, teacher of the law under the Ritsuryo system), and the staff which compiled the main volumes of Engikyaku are assumed to have consisted mainly of the same persons.
編纂者を直接示す記録は無いが、臨時格を追加したときに編纂に関与した人物として左大臣藤原時平が総裁を務め、藤原定国（大納言・右近衛大将）・三善清行（文章博士）・大蔵春行（民部大輔）・藤原善経（明法博士）が挙げられており、「延喜格」本文の編纂もほぼ同じ人員構成であったと考えられている。