Angola, Botswana, Burundi, Congo [The Democratic Republic of the], Kenya, Malawi, Mozambique, Namibia, South Africa, Swaziland, Tanzania [United Republic of], Zambia, Zimbabwe.
Northern and north-eastern Angola and southern Zaire across to southern Kenya, and south to north-eastern Namibia, northern Botswana, eastern Zimbabwe and eastern South Africa.
 
Population
Estimated population is unknown (2010).
Trumpeter Hornbill (Bycanistes bucinator) [XC442072]
by Lynette Rudman from uMhlathuze Municipality (near Richards Bay), (South) Uthungulu DC, KwaZulu-Natal, South Africa (call)
Trumpeter Hornbill (Bycanistes bucinator) [XC895357]
by id from Dududu (near Emahlathini), Ugu District Municipality, KwaZulu-Natal, South Africa (call)
Subspecies
Genus sometimes merged with Ceratogymna.