Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, El Salvador, French Guiana, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Venezuela.
Vagrant to USA.
Unknown to Trinidad and Tobago (B).
Population
Estimated population is 5,000,000 - 50,000,000 (2010).
Masked Tityra (Tityra semifasciata) [XC821547]
by JAYRSON ARAUJO DE OLIVEIRA from Parque natural de Porto Velho - Rond\u00f4nia, Brazil (song)
Masked Tityra (Tityra semifasciata) [XC641714]
by Mauricio Cuellar Ramirez (@Birding.travel) from Pava Negra Nature Reserve - Florencia, Caquet\u00e1., Colombia (call)
Subspecies
Nominate subspecies and fortis intergrade in western Amazonia, such that distributional limit of each not entirely clear. Subspecies hannumi often merged with griseiceps.
griseiceps Ridgway, 1888 - Western Mexico (coast region from northern/central Sinaloa and western Durango south to southern Oaxaca).
personata Jardine & Selby, 1827 - Eastern Mexico (south-western Tamaulipas, south-eastern San Luis Potosí, northern Distrito Federal and northern Puebla east to Yucatán), northern and southern Guatemala, Belize, western and central Honduras, El Salvador and north-central Nicaragua.
costaricensis Ridgway, 1906 - South-eastern Honduras, Nicaragua (except north-central area), Costa Rica and western and central Panama (including Coiba I and Cébaco I).
columbiana Ridgway, 1906 - Eastern Panama, northern and western Colombia (Bolívar and Magdalena south to Chocó, northern Antioquia and west-central Santander) and north-western and northern Venezuela (Sierra de Perijá, Andes, and coastal range from Yaracuy east to Miranda).
nigriceps Allen, JA, 1888 - Extreme south-western Colombia (Nariño) and north-western Ecuador (Esmeraldas, Manabí, western Pichincha, western Guayas, Los Ríos, north-western Azuay).
fortis von Berlepsch & Stolzmann, 1896 - Eastern Colombia (eastern slope of eastern Andes), eastern Ecuador (along base of eastern slope), eastern Peru (Loreto and San MartÃn south to eastern Ayachucho and Puno), northern and eastern Bolivia (La Paz, Cochabamba and Beni east to Santa Cruz) and west-central Brazil (Mato Grosso).
semifasciata (Spix, 1825) - French Guiana, Brazil (primarily south of Amazon in central and southern Amazonas east to Pará, Amapá and northern Maranhío, south to Acre, Rondônia, southern Mato Grosso and northern Goiás) and north-eastern Paraguay (Canindeyú).