Câmpia Blahnița (plain of Blahnița) is the plain adjacent to the river Blahnița which is a tributary of the river Danube in the county of Mehedinți. The ethnographic zone is approximately this geographic region.^[1]

The inhabitants were moșneni, free villagers not enslaved to a landowner. However the boyars (feudal aristocracy and nobles) and monastic domains constantly expanded their lands resulting in the displacement of entire villages (for example Pristol and Punghina in 1604 and 1605) (Ciobanu and Surdu, 1982) and the villagers becoming țăran with feudal obligations.

The 1802–1831 zone of Blahnița included the Blahnița de Jos district and Blahnița de Sus district (upper and lower Blahnița) and originated from the previous Margine Plasa, where Plasa was an old historic administrative unit which was often based on an estate with a land owner. After 1831 Blahnița administrative district was reduced to only the former Blahnița de Jos with the main town of Vânju Mare.^[2]

As obligations in money and labour increased significantly discontent rose through the 19th century leading to the 1848 revolution against the boyars.^[1] Then Blahnița disappeared with the administrative reorganising in 1950.