Data on 27 mosses new for Petrozavodsk and its vicinities are provided. Six of these species: Bryum klinggraeffii Schimp., B. rubens Mitt., Dicranella staphylina H. Whitehouse, Pohlia annotina (Hedw.) Lindb., P. atropurpurea (Wahlenb.) H. Lindb., Polytrichum densifolium Wilson ex Mitt. are new to the moss flora of the Republic of Karelia, and Eurhynchium angustirete (Broth.) T. J. Kop. and Orthotrichum gymnostomum Bruch ex Brid. are red-listed in the republic. The localities, habitats and substrates are reported for each of the species. Philonotis tomentella Molendo was excluded from the moss flora of Petrozavodsk.