Tehuacán (Spanish pronunciation: [tehuaˈcan]) is the second largest city in the Mexican state of Puebla, nestled in the Southeast Valley of Tehuacán, bordering the states of Oaxaca and Veracruz. The 2010 census reported a population of 248,716 in the city and 274,906 in the surrounding Tehuacán Municipality, of which it serves as municipal seat. The municipality has an area of 390.36 km² (150.72 sq mi).