It has a surface of 203.013 km2. In the year 1991 their population belonged to 510.472 inhabitants, of the 257.442 they were male and 253.030 women.
The population's projection for the year 2000 belong to 618.486 inhabitants 310342 males and 308.144 women (data of the one
National institute of Statistic and Censuses - INDEC). The capital city is Viedma, located on the Río Negro, before
of their outlet in the ocean. other important cities are: General Roca, Cipolletti, San Antonio 0este, and San Carlos from Bariloche .