Donzac is a commune in the Gironde department in the region of Aquitaine. The municipality is located in the catchment area of the city of Bordeaux. Since the year 1962, the population is 120 to 140, currently at 153 inhabitants (as of 1 January 2011).
The municipality belongs to the canton and arrondissement Cadillac Langon.
Donzac is a wine community; the vineyards are among the appellations Premieres Cotes de Bordeaux and Cadillac.