Gatunki Hadrosaurus Leidy, 1858 Hadrosaurus foulkii Leidy, 1858 (gatunek typowy) Hadrosaurus agilis Marsh, 1872 = Claosaurus agilis. Hadrosaurus annectens Marsh, 1892 = Edmontosaurus annectens Lull, 1904. Hadrosaurus breviceps Marsh, 1889 nomen dubium = Kritosaurus breviceps nomen dubium = Trachodon breviceps nomen dubium Hadrosaurus cantabrigiensis Lydekker, 1888 nomen dubium = Trachodon cantabrigiensis Newton, 1892 Hadrosaurus cavatus Cope, 1871 nomen dubium Hadrosaurus longiceps Marsh, 1890 = Anatotitan longiceps Nopcsa, 1899 Hadrosaurus milo Cope, 1874 nomen dubium = Thespesius occidentalis Hay, 1902 nomen dubium Hadrosaurus minor Marsh, 1870 nomen dubium = Hadrosaurus cavatus Cope, 1871 nomen dubium = Edmontosaurus minor, nomen dubium = Trachodon minor nomen dubium = Trachodon cavatus nomen dubium Hadrosaurus mirabilis Leidy, 1856 nomen dubium = Trachodon mirabilis Leidy, 1868 Hadrosaurus navajovius Brown, 1910 nomen dubium = Kritosaurus navajovius nomen dubium Hadrosaurus notabilis Lambe, 1914 = Gryposaurus notabilis Baird and Horner,