[3] The district consists of the northern Batangas cities of Santo Tomas and Tanauan, as well as adjacent municipalities surrounding the Taal Lake: Agoncillo, Alitagtag, Balete, Cuenca, Laurel, Malvar, Mataasnakahoy, San Nicolas, Santa Teresita and Talisay, a configuration that has been in place since 1987.

Theresa V. Collantes of the Nationalist People's Coalition (NPC).

[6] Prior to its second dissolution in 1972, the third district encompassed the city of Lipa and the eastern Batangas municipalities of Balete, Laurel, Malvar, Mataasnakahoy, Padre Garcia, Rosario, San Jose, Santo Tomas, Talisay, and Tanauan.

The southeastern municipalities of Lobo and San Juan were also part of the district from its creation until 1928 when a minor reorganization, enacted into law a year earlier, transferred them to the second district.

Simultaneously, Tanauan became part of this district.