San Martín Texmelucan de Labastida is a city located in the west-central region of the Mexican state of Puebla. It serves as the municipal seat for the municipality of San Martín Texmelucan and is situated adjacent to the southwest corner of the state of Tlaxcala.
The city is ranked as the fifth-largest urban center within the state of Puebla. According to data from the 2020 census, the population of San Martín Texmelucan de Labastida was 155,738 inhabitants.