The Agoo–Damortis Protected Landscape and Seascape is located on the eastern side of Lingayen Gulf in southern La Union, Philippines.

It was established in 2000 to protect 10,648.94 hectares (26,314.1 acres) of coastal area, including mangrove swamps, seagrass beds and stretches of fine black sand beaches.

[2] It covers approximately 30 kilometres (19 mi) of the coastline of Lingayen Gulf shared between the municipalities of Agoo, Santo Tomas and Rosario.

The Agoo–Damortis park is located in 25 coastal barangays in southern La Union from Santa Rita in Agoo to the border with the province of Pangasinan.

Mangroves dominate the foreshore area which provide spawning and nursery grounds for fishes and crustaceans, and habitat for both local and migratory birds.