Twenty-one lichen-forming and two lichenicolous fungi species are reported as new to Armenia. Four of these, Arthopyrenia cerasi, Chaenothecopsis treicheliana, Melaspilea ochrothalamia and Punctelia jeckeri, are new for the whole of SW Asia. One genus, Bacidina, is also new for Armenia. Short discussions are added for Anaptychia roemeri, Arthopyrenia cerasi, Bacidia polychroa, Caloplaca polycarpoides, Candelariella antennaria, C. lutella, Chaenothecopsis treicheliana, Cladonia rei, Lecanora impudens, Melaspilea ochrothalamia, Pertusaria constricta, Punctelia jeckeri and Stigmidium congestum. The lichenicolous fungus Chaenothecopsis treicheliana, earlier considered as a synonym of C. hospitans, is confirmed to be a separate species.