The Hñähñu or Otomí people are concentrated in the southern and eastern parts of the municipality, in 34 settlements. The main ones are Santiago Mexquititlán and San Ildefonso Tultepec.
The Hñähñu or Otomí population is concentrated in the southeastern areas of the municipality, with a total of 34 communities. Notably, Santiago Mexquititlán and San Ildefonso Tultepec are two of the main settlements.