The goal of this study is to produce a comparative analysis of the socio-economic transformations in a typicalmountain administrative district at the NUTS 3 level since the 1989 transition to market economy in Bulgaria. Demographic and economic indicators are utilized to provide a diagnosis of the current state of affairs, but also to highlight tendencies, which are noteworthy for the investigation and administration of districts that belong to both border and mountain peripheries. The main proposition of this paper is that in the post-1989 conditions the Oblast’s “double” periphery position is severely impairing its overall development in relation to the rest of the country. The large and widening discrepancies between national and regional demographic and economic indicators point to a pronounced process of marginalization of certain areas, which necessitates the implementation of a specifically targeted development policy.

areas with special geographic characteristics, deep periphery, development of mountain and border areas, transition economy, Bulgaria