Source: Jackson, R.W. "The Web Book of Regional Science"

Region is usually defined as a geographical area smaller than the national territory on which it is situated. Region can thus be a municipality, a town, a county, a group of counties or a country. Regions do not necessarily concur with administrative borders, as the definition of region depends on the current issue of consideration (e.g. labour market area, river basin area, and the like).

Source: Project OBNOVA – Support to the Ministry of Public Works, Reconstruction and Construction in the Formulation of National and Regional Development Policy, January 2003.

The notion ‘region’ signifies a geographical area within the national territory of a country that can be defined either in terms of administrative borders or in terms of economic and social characteristics that differentiate the region from its surrounding areas.

Source: Basic Guidelines for the Elaboration of Strategic Development Programs, GTZ, 2003.

Region is a spatial area with more or less clear recognizable borders or characteristics, which is a part of a country or of any other territorial unit; region usually includes municipalities, towns, counties, etc.