Pink-headed Warbler is resident, and endemic to a relatively small area in the northern Neotropics; the distribution is restricted to the highlands of Chiapas in southeastern Mexico and the highlands of Guatemala.
This species is distributed in two regions: in central highlands of Chiapas, and in the southern part of Chiapas (Tacaná Volcano) and in the highlands of western Guatemala. Recent records in Chiapas are from Tacaná Volcano Biosphere Reserve, Huitepec Ecological Reserve, close to Rancho Nuevo in San Cristobal de Las Casas, Chiapas and Cerro Tzontehuitz. At Tacaná Volcano is widely distributed; it is considered relatively common by most sources, but at times is rare (Wilson and Will 1997, personal observations). On the slopes and foothills of Tacaná Volcano and Rancho Nuevo, Municipality of San Cristobal de las Casas, there are significant populations.
Geographical coordinates (latitude, longitude) for sites in Chiapas: Huitepec Ecological Reserve (16° 44’ N, 92° 41’ W), Municipality of San Cristóbal de Las Casas; Rancho Nuevo (16°40’ N, 92°35’ W), Municipality of San Cristóbal de Las Casas, Chiapas; Tacaná Volcano, locality of Chiquihuite, Municipality of Union Juarez, Chiapas. Locality El Águila, Municipality Cacahotán, locality Cordón Pico-Paxtal, Municipality Siltepec, locality Ojo de Agua, Municipality Escuintla (Martínez-Vergara 2009, SEMAVHIN 2011).
The elevational range of Pink-headed Warbler in Mexico is 1800-3500 m (Howell and Webb 1995).