El Salvador (NB), Honduras (NB), Mexico (NB), Nicaragua (NB), USA (B).
Vagrant to Belize, Panama.
Breeds in western USA from coastal mountains of southern Washington south to central and southern California (including Sierra Nevada). Migrates to non-breeding grounds mainly from northern Mexico south to northern Nicaragua, casually south to Costa Rica; also in smaller numbers to coastal southern California.
 
Population
Estimated population is 2,400,000 (2010).
Hermit Warbler (Setophaga occidentalis) [XC153523]
by Lance A. M. Benner from Chevron Meadow (Crane Flat), Yosemite National Park, California, United States (song)
Hermit Warbler (Setophaga occidentalis) [XC447417]
by Paul Marvin from Peavine Road, Placer County, California, United States (song)