This paper presents a comprehensive, hierarchically structured habitat classification system for South Tyrol (Alto Adige), Italy. It includes natural habitats and those created by man, both with and without vegetation cover. The checklist contains five hierarchical levels. The two upper levels are defined on the basis of landscape structure, site factors and vegetation physiognomy. Units of the lower hierarchy levels are primarily characterized by the indication of vegetation types (syntaxa). It is intended as a general basis for the interdisciplinary work of scientists active in the province.