Bangladesh, Bhutan, Cambodia (B), China (mainland), India, Laos (B), Myanmar, Nepal, Sri Lanka, Thailand, Vietnam.
Most of Indian Subcontinent (south to Sri Lanka) east to Myanmar, southern and south-eastern China (including Hainan), Thailand (except S) and Indochina.
 
Population
Estimated population is unknown (2010).
Ashy Woodswallow (Artamus fuscus) [XC318460]
by Greg Irving from Bang Phra reservoir, Chon Buri, Thailand (song)
Ashy Woodswallow (Artamus fuscus) [XC639720]
by Greg Irving from Doi Lang West Slope, Doi Pha Hom Pok National Park, Fang, Chiang Mai, Thailand (call, song)