This zone is bordered on the south and east by Awsi Rasu, on the southwest by the Amhara Region, on the northwest by the Tigray Region, and on the north by Kilbet Rasu.

The administrative center of the Zone is Kaluwan (also named Gulina); the largest town is Dibina.

Based on the 2007 Census conducted by the Central Statistical Agency of Ethiopia (CSA), this Zone has a total population of 246,822, of whom 140,741 are men and 106,081 women.

Two largest ethnic groups reported in Fantí Rasu were the Afar (98.67%), and Amhara (1.09%); all other ethnic groups made up 0.24% of the population.

Of the school-age school-age children, 1.06% (1.49% male and 0.51% female) were currently attending school, which is lower than the Regional average; 2.20% of the total population over the age of 10 (3.48% male and 0.55% female) are reported to be literate.