Legislative districts of Laguna

The province is currently represented in the lower house of the Congress of the Philippines through its first, second, third, and fourth congressional districts.

The component cities of Biñan, Calamba, and Santa Rosa, while remaining integral parts of the province, granted their separate congressional representations in 2015, 2018, and 2019, respectively.

84 and 103 issued by Philippine Executive Commission Chairman Jorge Vargas in 1942, the municipality of Infanta (including what is now General Nakar and Real) and the Polillo Islands were transferred to Laguna's jurisdiction, a setup which only lasted for the duration of the Second World War.

Two delegates represented the expanded province in the National Assembly of the Japanese-sponsored Second Philippine Republic: one was the provincial governor (an ex officio member), while the other was elected through a provincial assembly of KALIBAPI members during the Japanese occupation of the Philippines.

Laguna was reapportioned into four congressional districts under the new Constitution[2] which was proclaimed on February 11, 1987, and elected members to the restored House of Representatives starting that same year.