Lowland areas of north-eastern Bolivia (eastern Pando, eastern La Paz, eastern Cochabamba, Beni, Santa Cruz), adjacent Brazil (eastern Rondônia, south-western Mato Grosso) and extreme north-eastern Paraguay.
 
Population
Estimated population is unknown (2010).
Fawn-breasted Wren (Cantorchilus guarayanus) [XC864692]
by Richard E. Webster from \u00c1rea Protegida y Reserva Natural Aquicuana, near Riberalta, Bolivia (call)
Fawn-breasted Wren (Cantorchilus guarayanus) [XC391490]
by Cl\u00e9ment DELALEU from Guarayos, Departamento de Santa Cruz, Bolivia (call)
Subspecies
No subspecies.
Forms a superspecies with Buff-breasted Wren (Cantorchilus leucotis), Superciliated Wren (Cantorchilus superciliaris) and Long-billed Wren (Cantorchilus longirostris) and sometimes regarded as conspecific with Buff-breasted Wren (Cantorchilus leucotis), although vocalizations quite distinct.