The aim is to find out whether there are regional disparities in the study area of the NUTS-3 region Klagenfurt-Villach, and, if so, to which extent they occur. Additionally, it should be examined which projects and measures regarding regional development contribute to the reduction of these disparities. In order to illustrate regional disparities, the boroughs and the six micro regions defined by the author have been classified into active and passive spaces. The NUTS-3 region Klagenfurt-Villach consists of both four political districts, two urban centres, and 38 mainly rural boroughs. The area examined is the Carinthian centre, and it covers huge parts of valley ‘Klagenfurter Becken, but also mountain ranges like the Karawanken. Based on current human geographical processes and structures the structurally strong and weak areas can be filtered out and represented cartographically with reference to selected parameters. In this content, especially the boroughs of Zell/Sele and Arriach are considered passive spaces. In contrast, the urban centres of Klagenfurt and Villach meet the expectations in that they are active spaces in the examination area. However, the same positive judgement also holds true for the majority of boroughs at lake Wörthersee and several boroughs surrounding the towns. As for boroughs, it should be mentioned that the weak passive spaces can be found especially in Rosental and in the north-west of the area examined. On the basis of appropriate development projects and measures the reduction of the regional disparities in the examined area is pursued. The LEADER programme of the European Union, the efforts of the department of the federal state of Carinthia in charge, the LEADER regions, the regional associations, and in particular the citizens themselves make a significant contribution to it.