San Luis, officially the Municipality of San Luis (), is a municipality in the province of Batangas, Philippines. According to the , it has a population of people.
No reliable information could be gathered as to why the town is called San Luis. However, some people believe that it was named as such because it was established during the feast of Saint Louis.
San Luis was historically part of Taal. It was established as an independent town on August 25, 1861. However, in 1903, due to small income, the town was made a part of Taal once again, with all the barrios in existence retaining their names, while the town center (poblacion) was reverted to its Spanish-era name Balibago. On February 2, 1918, San Luis was re-established.
In 1961, the barrios of Pacifico and Sampa were separated from San Luis and annexed to the new municipality of Santa Teresita.
According to the Philippine Statistics Authority, the municipality has a land area of , constituting of the total area of Batangas.
San Luis is politically subdivided into 26 barangays, as shown in the matrix below. Each barangay consists of puroks and some have sitios.
In the 2024 census, San Luis had a population of 36,841 people. The population density was .
The San Luis Schools District Office governs all educational institutions within the municipality. It oversees the management and operations of all private and public, from primary to secondary schools.