• Polyactium (A.P. de Candolle) Ecklon & Zeyher, 1835 accepted as Pelargonium L'Héritier ex W. Aiton, 1789
• Polyadenum Yin, 1980
• Polyakius Kirejtshuk, 2020 †
• Polyamius De Long & Sleesman, 1929 accepted as Polyamia De Long, 1926
• Polyangium Link, 1809 (Approved Lists, 1980) [Family: Polyangiaceae]
• Polyangium Looss, 1902 [Family: Microscaphidiidae]
• Polycladium C.T. Ingold, 1959 [Family: Ascomycota incertae sedis]
• Polycladium Qian & Xiao, 1985 † (uncertain) [Family: Calcarea (awaiting allocation)]
• Polycodium Rafinesque, 1818 (unaccepted)
• Polydius Dejean, 1821 (unaccepted > nomen nudum)
• Polydius Schoenherr, 1826 accepted as Polyteles Germar, 1829
• Polydius Schönherr, 1823 accepted as Polyteles Germar, 1829
• Polyedrium Nägeli, 1849 accepted as Tetraedriella Pascher, 1930
• Polyparium Korotneff, 1886 accepted as Stichodactyla Brandt, 1835
• Polypodium Linnaeus, 1753 [Family: Polypodiaceae]
• Polypodium Ussow, 1887 [Family: Polypodiidae]
• Polyprium Hilgendorf, 1888 accepted as Polyprion Oken, 1817