It initially consisted of 25 barrios, all carved out from Bauan, namely: San Pascual, Danglayan, San Antonio, Laurel, Bayanan, San Mateo, Banaba, Natunuan North, Natunuan South, Kaing-in, Santo Niño, Sambat, Palsahingin, Alalum, Santa Elena, Del Pilar, Malaking Pook, Pila, San Mariano, Pook ni Banal, Pook ng Kapitan, Mataas na Lupa, Ilat, Gelerang Cawayan (Gelerang Kawayan), and Resplando.

[5] The religious populace and congregation therefore changed the name of the Lagnas neighborhood to San Pascual De Baylon in honor of the Roman Catholic saint.

The municipality borders Bauan on the west, Alitagtag and San Jose on the north, and Batangas City on the east.

The town is home to an oil refinery, chemical plants and various subdivisions and housing projects, as well as other industrial and commercial establishments.

There are numerous elementary and high schools, offering primary and secondary education in the town of San Pascual.