It is a first class urban municipality in the province of Laguna, Philippines.
It is named after its patron saint, Saint Peter. San Pedro is Laguna's gateway to Metro Manila since it lies on the boundary with Muntinlupa City, Metro Manila's southernmost city. This position makes San Pedro a popular suburban residential community, where many residents commute daily for work in Metro Manila. According to the latest census, it has a population of 281,808 inhabitants in 48,341 households.
Aside from being a primarily suburban community, San Pedro also hosts a large number of factories. Among them include Kimberly-Clark, Alaska Milk Corporation and General Milling Corporation.
With a total land surface area of 24.05km2, San Pedro is the smallest town of the first district of Laguna and the 3rd smallest in the entire province. However, it is the town with the highest population density in the province due to its ranking as the 2nd most populous town after Calamba City.