The present article focuses on the system of demonyms of the administrative division of Mexico. The research tasks of the article consist in systematizing the morphological devices, revealing the cultural layers of demonyms, the parameters of their variation, and cognitive and affective role regarding the self-identification of the Mexican people. The authors discuss subcultural components, as well as the algorithms of formation of the unofficial demonyms, reconstruct the motivation of culturally bound demonyms. The conducted analysis has allowed presenting the system of Mexican demonyms as a multi-dimensional, nationally specific entity, which at the same time belongs to a unique functional Spanish-speaking continuum. © 2021, Czech Academy of Sciences. All rights reserved.