Canada, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, USA (B).
Breeds from central Alaska and western Canada (from southern Yukon) south in western USA to east-central California, east-central Nevada, central Utah and the Four Corners Region east to north-central New Mexico. Winters locally south-western USA and south from Mexico (Pacific slope and interior highlands) to Guatemala, El Salvador, Honduras and probably north-central Nicaragua.
 
Population
Estimated population is 13,000,000 (2010).
Hammond's Flycatcher (Empidonax hammondii) [XC244352]
by Frank Lambert from Area Natural Protegida La Monta\u00f1ona, Chalatenango, El Salvador, El Salvador (call)
Hammond's Flycatcher (Empidonax hammondii) [XC388060]
by Nicholas Comparato from Grandview Cemetery, Fort Collins, Larimer County, Colorado, United States (call)