Part of the West Welega Zone, Gimbi woreda is bordered on the south by Haru, on the southwest by Yubdo, on the west by Lalo Asabi, on the north by the Benishangul-Gumuz Region, on the east by the East Welega Zone, and on the southeast by an exclave of the Benishangul-Gumuz Region.
[1] Iron and phosphate deposits are known to be located in the neighborhood of Bikilal, a village 18 to 20 kilometers north of Gimbi, but have not yet been commercially developed.
[3] Based on figures published by the Central Statistical Agency of Ethiopia in 2005, this woreda has an estimated total population of 147,701, of whom 75,078 are men and 72,623 are women; 40,162 or 27.19% of its population are urban dwellers, which is greater than the Zone average of 10.9%.
With an estimated area of 1,183.44 square kilometers, Gimbi has an estimated population density of 124.8 people per square kilometer, which is greater than the Zone average of 91.7.
The majority of the inhabitants observed Ethiopian Orthodox Christianity, with 51.83% reporting that as their religion, while 40.18% were Protestant, 4.79% were Muslim, and 1.76% Catholic.