Llanos Costa is a barrio located in the southwestern municipality of Cabo Rojo, positioned in the western region of Puerto Rico near the Caribbean coast. The barrio name itself—combining "llanos" (plains) with "costa" (coast)—reflects its geography: a largely flat, coastal area with direct access to the Caribbean's influence on climate and land use patterns typical of this part of the island.

As a coastal barrio in Cabo Rojo, Llanos Costa sits within one of the western municipalities known for mixed land use, combining agricultural heritage with residential and commercial development. The flat terrain and coastal proximity historically supported farming and fishing economies, and the landscape today reflects this heritage alongside modern settlement patterns. Property in coastal barrios of western Puerto Rico tends toward varied lot sizes, from small residential parcels to larger tracts that retain agricultural character or remain undeveloped. The area's proximity to the Caribbean means exposure to salt air and tropical weather patterns, factors that influence property maintenance and land use decisions.

The barrio's relationship to broader Cabo Rojo follows the municipality's general pattern of dispersed development rather than concentrated urban density. Residents and property owners in Llanos Costa typically balance access to coastal resources and the quieter pace of a smaller barrio against the distance to larger commercial and service centers in the main municipality or nearby towns. For those researching property ownership or considering investment in this area, understanding cadastral records and historical parcel boundaries is essential given the mix of developed lots and potential acreage.

Propieda maintains property records and cadastral data for parcels within Llanos Costa, enabling owners and researchers to access parcel-level information and ownership history from official CRIM records.

Cabo Rojo: Cabo Rojo, at Puerto Rico's southwestern corner, encompasses the famous Boqueron beach resort area, salt flats, and Los Morrillos lighthouse. This municipality attracts beach lovers, nature enthusiasts, and those seeking the laid-back "Cabo Rojo lifestyle." Properties range from beach condos to agricultural land and residential developments.