and 5 barrios, and its residents are known as culebrenses. With a population of 1,792 as of the 2020 Census, it is the least populous municipality in Puerto Rico.

Originally called Isla del Pasaje and Isla de San Ildefonso, Culebra is also known as Isla Chiquita ("Little Island"), Cuna del Sol Borincano ("Cradle of the Puerto Rican Sun") and Última Virgen ("Last Virgin", due to its position at the western end of the smaller islands of