Santo Tomas, officially the Municipality of Santo Tomas, is a municipality in the province of Pampanga, Philippines. According to the 2020 cen…Santo Tomas, officially the Municipality of Santo Tomas, is a municipality in the province of Pampanga, Philippines. According to the 2020 census, it has a population of 42,846 people. It is a mainly agricultural and fishing community; industry includes casket manufacture, ceramics, and carpentry.