The Puerto Rico senatorial districts (Spanish: distritos senatoriales) refers to the electoral districts in which Puerto Rico is divided for the purpose of electing 16 of the 27 members of the Senate of Puerto Rico (with the other 11 being elected at-large).
The island is currently divided in eight senatorial districts, each based on a similar number of inhabitants, and comprising one or more representative districts—the electoral districts in which Puerto Rico is divided for the elections of the members of the House of Representatives.
The first division of senatorial districts occurred in 1917, and came as a result of the signing of the Jones-Shafroth Act.
Originally, the island was divided in seven senatorial districts.
[3] The last revision occurred in 2011, and it was led by Federico Hernández Denton (President), Virgilio Ramos González, Héctor Luis Acevedo.