10 (2016 BBC). Ethnic population: 4,000 (2016 BBC).
Isiolo and Laikipia counties: Mukogodo forest west of Doldol, foothills north of Mount Kenya; Turkana and Samburu counties: Lake Turkana south tip.
Most ethnic Yaaku speak Maasai [mas] as L1. Positive attitudes. Most or all “Ndorobo” groups also use an adopted language.