There is no harmonized definition of cities freely available in the European Neighbouring countries. This report collects the different national definitions and expertises the availability of urban delineations and data. The documentation and data were collected in the 17 national census boards and completed by databases built by researchers. A common “syntax” has been used for categorizing the available information (administrative divisions, urban definition, data availability, references). A typology of the definitions has been constructed (tables and map), the urban population level has been mapped. Each country is described by a single sheet following the general syntax.