The Bewick's wren once had a range that extended throughout much of the United States and Mexico and parts of Canada. It used to be fairly common in the Midwest and in the Appalachian Mountains, but it is now extremely rare east of the Mississippi River. It is still found along the Pacific Coast from Baja California to British Columbia, in Mexico, and in a significant portion of the Southwest, including Texas, Arizona, New Mexico, and Oklahoma. Western populations do not tend to migrate. Eastern populations, prior to their decline, used to migrate from its northern range to the Gulf Coast.