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) [XC429904]
by Tony Archer from Amani Forest Reserve, Road to Amani from Muheza, Tanga Region, Tanzania (call, song)
Trumpeter Hornbill (Bycanistes bucinator) [XC277595]
by Faansie Peacock from Komga (near Amatola Coastal), Amatole, Eastern Cape, South Africa (call)
Subspecies
Genus sometimes merged with Ceratogymna.