Kalu (also known as Harbu) is one of the woredas in the Amhara Region of Ethiopia. Part of the Debub Wollo Zone, Kalu is bordered on the west by Dessie Zuria, on the north by Were Babu, on the south and east by the Oromia Zone, on the southeast by Argobba special woreda, and on the southwest by Abuko. The administrative center for this woreda is Harbu; other towns in Kalu include Ancharo, Gerba and Degan.