South Norway (Norwegian: Sør-Norge) is a geographical region encompassing the southern portion of Norway. It is generally defined as the part of the country located south of the region of Northern Norway (Nord-Norge), with the boundary traditionally placed at the southern border of Nordland county.
The region includes four of the five major traditional lands (landsdeler) of Norway: Østlandet (Eastern Norway), Vestlandet (Western Norway), Sørlandet (Southern Norway), and Trøndelag. South Norway contains the vast majority of the country's population, infrastructure, and major urban centers, including the capital city of Oslo, as well as Bergen, Stavanger, and Trondheim.
Geographically, South Norway is characterized by diverse terrain, including the Scandinavian Mountains, which contain the highest peaks in Northern Europe, such as Galdhøpiggen. The region features extensive coastlines and numerous fjords, particularly along its western edge. The climate ranges from a temperate maritime climate in the coastal areas to a more continental climate in the eastern interior and subarctic conditions in the higher elevations.
In statistical and meteorological contexts, South Norway is frequently used as a collective term to distinguish the southern half of the country from the northern territories. The term is distinct from Sørlandet, which refers specifically to the southernmost region of the country, comprising the county of Agder.