Congo [The Democratic Republic of the], Kenya, Rwanda, Tanzania [United Republic of], Uganda.
Eastern Democratic Republic of Congo (from south-eastern edge of Ituri south to Mt Kabobo), south-western Uganda (Kalinzu, Bwindi), south-western Rwanda, western Burundi, western Tanzania (Kigoma) and western Kenya.
 
Population
Estimated population is unknown (2011).
Kakamega Greenbul (Arizelocichla kakamegae) [XC83838]
by Peter Boesman from Mahale Mountains National Park, Mfitwa Forest [29.80622, 6.13998], Tanzania (call, contact call)
Kakamega Greenbul (Arizelocichla kakamegae) [XC739414]
by id from Buhoma, Bwindi Impenetrable Forest, Uganda (call)
Subspecies
Shelley's Greenbul (Arizelocichla masukuensis) and Kakamega Greenbul (Andropadus kakamegae) (Sibley and Monroe 1990, 1993) have been lumped into Andropadus masukuensis following Dowsett and Forbes-Watson (1993).
Considered by some authors to be a subspecies of Shelley's Greenbul (Arizelocichla masukuensis).