Western and west-central USA (southern Idaho and northern Wyoming south to eastern California, Arizona and south-western Texas) south through upland Mexico to highlands of Guatemala. Northern populations winter in Mexico and Guatemala.
 
Population
Estimated population is 4,000,000 (2010).
Broad-tailed Hummingbird (Selasphorus platycercus) [XC495178]
by Thomas G. Graves from Rocky Mountains (near Tererro), San Miguel County, New Mexico, United States (call, chips, wing sounds)
Broad-tailed Hummingbird (Selasphorus platycercus) [XC331741]
by Anthony Gliozzo from Mission Viejo, Orange County, California, United States (flight call, mechanical wing sound)
Subspecies
In past, occasionally placed in Archilochus.
Proposed subspecies guatemalae (Guatemala) is poorly defined: morphological patterns and variation in size are clinal in character.