Agusan is a Manobo language of northeastern Mindanao in the Philippines.
Distribution and dialects
Agusan Manobo (consisting of the Umayam, Adgawan, Surigao, and Omayamnon dialects) is spoken in the following areas.
Agusan del Sur Province: western area, southeast of Lake Buluan
inland areas of Surigao del Sur Province
southwest of Lanuza Peninsula to Lianga Bay in Surigao del Sur Province
western Agusan del Norte Province
Compostela Valley and Davao del Norte provinces: continuous strip along northern borders
Surigao del Norte Province: southern tip, inland
scattered small border areas of Bukidnon and Davao Oriental provinces
Dibabawon Manobo is spoken in the following areas.
northern Compostela Valley Province: upper Agusan River area
Davao Oriental Province: Boston and Cateel municipalities
Davao del Norte Province: Asuncion municipality (in Manguagan)