Santo Tomas, officially the City of Santo Tomas, is a 1st class component city in the province of Batangas, Philippines. According to the 2020 census, it has a population of 218,500 people. The city is part of Mega Manila resulting from the continuous expansion of Metro Manila. It borders the cities of Calamba to the north, Los Baños to the north-east, Alaminos to the east, Tanauan and Malvar to the west, and Lipa to the south.