The Borough of Siparia is the fifth and newest Borough of the Republic of Trinidad and Tobago, located in the southwestern portion of the island, it is Trinidad and Tobago's southernmost borough. The Siparia Borough Corporation is headquartered in Siparia proper (downtown). Other urban areas include Cedros, Fyzabad, La Brea, Santa Flora, South Oropouche.
On Thursday 19 November 2020, while addressing the public on the re-opening of the Diego Martin South Community Centre, Prime Minister and MP for Diego Martin West Dr Keith Rowley announced that Siparia, along with Diego Martin, would be elevated to borough status in 2021. Both Siparia and Diego Martin were declared boroughs in 2023.