Eighteen lichen species are reported as being new to Finland, including two species new to Europe (E) and six species new to Fennoscandia (Fe): Bacidina modesta, Bacidina omnicola (Fe), Bacidina populnea, Bilimbia fuscoviridis, Candelariella pulchella, Cladonia krogiana, Japewia gyrophorica, Lecania madida, Lecidella drakensis (E), Leprocaulon nicholsiae (Fe), Parvoplaca nigroblastidiata, Peltigera alkalicola (E), P. appalachiensis, P. jonii, Psoroglaena neglecta (Fe), Sarcogyne canadensis (Fe), Sarcogyne nivea (Fe) and Toniniopsis pruinosa (Fe). DNA barcode (ITS) sequences are provided for all species.