The genus Campanula L. (Campanulaceae) in Iran has been revised in preparation for the treatment in the Flora of Iran. In Iran the genus consists of five subgenera (Campanula, Megalocalyx, Roucela, Brachycodonia and Rapunculus), 10 sections (Quinqueloculares, Campanula, Sibirica, Involucrata, Cordifoliae, Rupestres, Scapiflora, Saxicolae, Dictycalyx and Rapunculus) and 44 species. Since the Flora Iranica treatment by Rechinger & Schiman-Czeika in 1965 eight additional species (Campanula crispa, C. sibirica, C. coriacea, C. hakkiarica, C. lamondiae, C. conferta, C. hermannii and C. fastigiata) have been recorded from Iran. Campanula savalanica is a synonym of C. bayerniana. A key to the species in Iran is presented and the endemic species are highlighted.
