Zialo (self-identification Ziolo) is a language spoken by the Zialo people in Guinea. The language of Zialo which belongs to the Southwestern group of the Mande branch of the Niger–Congo language family is spoken by approximately 25,000 people residing in the province of Macenta in the southeast of Guinea. The Zialo area covers over 50 villages (including two centers of subprefectures). Nearly a third of all Zialo live now in the nearby towns of Macenta and Guéckédou, as well as in the city of Conakry. The Zialo language does not have its own writing system; people use French in all official paperwork.