The Nahuas (/ˈnɑːwɑːz/ NAH-wahz) are a Uto-Nahuan ethnic group and one of the Indigenous people of Mexico, with Nahua minorities also in El Salvador, Guatemala, Honduras, Nicaragua, and Costa Rica. They comprise the largest Indigenous group in Mexico, as well as the largest population out of any North American Indigenous people group who are native speakers of their respective Indigenous language. Amongst the Nahua, this is Nahuatl. When ranked amongst all Indigenous languages across the Americas, Nahuas list third after speakers of Guaraní and Quechua.
The Mexica (Aztecs) are of Nahua ethnicity, as are their historical enemies and allies of the Spaniards: the Tlaxcallans (Tlaxcaltecs). The Toltecs which predated both groups are often thought to have been Nahua as well. However, in the pre-Columbian period Nahuas were subdivided into many groups that did not necessarily share a common identity.