Angola, Benin, Burundi, Cameroon, Central African Republic, Congo [The Democratic Republic of the], Congo [The Democratic Republic of the], Côte dIvoire, Equatorial Guinea, Gabon, Ghana, Guinea, Guinea-bissau, Kenya, Liberia, Nigeria, Rwanda, Sierra Leone, Sudan, Tanzania [United Republic of], Uganda.
Equatorial Africa from Guinea Bissau, Guinea, Liberia and Ivory Coast east to Nigeria, Central African Republic, Cameroon, Bioko (Fernando Po), Gabon, northern Angola, Congo, Zaire, southern Sudan, Uganda, Rwanda, Burundi, north-western Tanzania and western Kenya.
 
Population
Estimated population is unknown (2010).
Great Blue Turaco (Corythaeola cristata) [XC138908]
by Jacob C. Cooper from Mabira Forest Reserve (The Rain Forest Lodge), Buikwe district, Uganda (call)
Great Blue Turaco (Corythaeola cristata) [XC239711]
by Martin St-Michel from Mubwindi trail, Ruhija, Bwindi Impenetrable Forest, Uganda (call, song)
Subspecies
Eastern African birds formerly separated in subspecies yalensis.