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) [XC700890]
by Brendan Sloan from Bujumbura (near Katoke), Wilaya ya Rukungiri, Mkoa wa Magharibi, Uganda (song)
Great Blue Turaco (Corythaeola cristata) [XC878220]
by id from Tiwai Island Wildlife Sanctuary, Sierra Leone, Sierra Leone (song)
Subspecies
Eastern African birds formerly separated in subspecies yalensis.