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) [XC146294]
by Don Henise from Haskell Peak Road, Tahoe National Forest (near Calpine), Sierra, California, United States (song)
Hermit Warbler (Setophaga occidentalis) [XC748361]
by Thomas Magarian from Chapman Saddle Rd, Sierra County, California, United States (song)