South-western Canada (British Columbia) south through western USA (east to eastern Texas) to northern Mexico (northern Baja California, north-eastern Sonora to north-western Tamaulipas). Winters in western and south-central Mexico (southern Sonora to northern Guerrero and western Veracruz).
 
Population
Estimated population is 2,000,000 (2010).
Black-chinned Hummingbird (Archilochus alexandri) [XC349692]
by Thomas G. Graves from Skidaway Island, Chatham County, GA USA, United States (wing-beat)
Black-chinned Hummingbird (Archilochus alexandri) [XC495007]
by id from Embudo Trail, Albuquerque, Bernalillo County, New Mexico, United States (call, song, wing sounds)
Subspecies
Genus sometimes merged into Mellisuga. Alternatively linked with Selasphorus. On occasion, considered to form a superspecies with Ruby-throated Hummingbird (Archilochus colubris) and some authors would also include Costa's Hummingbird (Calypte costae). "Trochilus violajugulum" is probably a hybrid with Anna's Hummingbird (Calypte anna).