The Gray Vireo, Vireo vicinior, winters mainly in coastal Sonora (including Tiburón and San Esteban islands) and sparsely in southern Baja California, southern Arizona (mountains of Yuma and western Pima counties), the Big Bend region of western Texas, and probably southwestern Coahuila (Phillips et al. 1964, Barlow and Wauer 1971, AOU 1983, Phillips 1991, Howell and Webb 1995). We report here a recent record of the Gray Vireo from the state of San Luis Potosí, México, and suggest that the winter distribution of the Gray Vireo may be more widespread than is currently recognized.