The social tuco-tuco (Ctenomys sociabilis) is a species of rodent in the family Ctenomyidae.

Its natural habitat is subtropical or tropical dry lowland grassland.

The social tuco-tuco is found in the mesic meadows at about 1000 m in elevation.

Its range is rather small at about 700 km2, bound by the Rio Limay to the east, the Rio Traful to the north, and the Lago Nahuel Huapi to the south.

This is evidenced by observed adult burrow sharing, female tendency to stay near her birthplace, and alloparental care.