Sixty-four species of calicioid lichens and fungi are reported from the state of Minnesota, which is located in the upper Midwest of the United States. Chaenothecopsis jordaniana and C. penningtonensis are new to science, Calicium denigratum is reported for the first time from the United States, and an additional 23 species are reported for the first time from the state. As the first comprehensive calicioid flora from the central part of North America, significant range extensions are also reported for eight species that were previously only known from eastern or western states and provinces. Information on previously published works and locations, community preferences and habitat ecology are provided for each species, as is an identification key to all species.