Temascaltepec is a municipality located in the Ixtapan Region of the State of Mexico in Mexico. Temascaltepec has an area of 547.5 km2. It borders the municipalities of Valle de Bravo, Amanalco de Becerra, Tejupilco, San Simón de Guerrero, Texcaltitlán, Zinacantepec, Coatepec Harinas, and Zacazonapan. Temascaltepec's population was 26,968 in 1990, but rose to 30,336 by 2005, according to INEGI.