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) [XC764151]
by id from Madera Canyon--Proctor Rd. to Whitehouse Rec. Area, Pima County, Arizona, United States (call)
Hammond's Flycatcher (Empidonax hammondii) [XC612099]
by Richard E. Webster from Oax, Mex, arroyo Guacamayas, Mexico (call)