Herbarium specimens of ferns kept at the Central Siberian Botanical Garden SB RAS (NS, NSK) were digitised in 2021. Specimens of 20 families of Polypodiopsida were included in this dataset except Equisetaceae. Family Ophioglossaceae was digitised and published separately (Kovtonyuk et al., 2021). Specimens published in datasets "Vascular plants from European Russia in the CSBG SB RAS Digital herbarium" (Kovtonyuk, Han, Gatilova, 2020, 2021) and "Foreign Asia herbarium collection in CSBG (NS)" (Gatilova et al., 2020) were also excluded. In the dataset specimens from 43 countries of Europe, Asia, America, Africa and Australia (Oceania) are presented, most of them are from Russia (6918). 5092 specimens from Russia are published in the first time. Collectors with most gathered specimens are: Krasnoborov I. M. (913), Ivanova M. M. (565), Shaulo D. N. (538), Malyshev L. I. (296), Kiseleva A. A. (281), Lashchinsky N. N. (270), Hanminchun V. M. (251), Vodopyanova N. S. (230), Bardunov L. V. (196), Peshkova G. A. (147), Lomonosova M. N. (133), Petrochenko Yu. N. (126), Andrulaitis S. Yu. (126), Artemov I. A. (116), Arslanova N. K. (Kovtonyuk N. K.) (104), Molchanov E. F. (93), Bolshakov N. M. (88), Chepurnov A. A. (85), Maskaev Yu. M. (81), Vlasova N. V. (76), Ronginskaya A.V. (73), Vereshchagin V. I. (73), Doronkin V. M. (71), Friesen N. V. (67), Popov M. G. (62), Zuev V. V. (61), Titov E. (49), Starovoitova Z. (49), Pospelov I. N. (44), Tyulina L. N. (42), Nechaev A. A. (42).