The coastal environmental profile of Lingayen Gulf, Philippines answers the objectives of the six-year Association of Southeast Asian NationsIUnited States Coastal Resources Management Project (ASEANIUS CRMP) (Philippine component). This profile is a collaborative effort of the researchers who summarized secondary data and planners who made updates based on primary information and those provided by local governments and agencies. The MSI synthesized the chapters on the physical setting, natural resources, pollution and coastal management issues (Chapters 1, 2, 4 and 7). The University of the Philippines in the Visayas and BFAR provided a comprehensive review of the capture fisheries and the aquaculture industry in the gulf (Chapter 3). The CSWCD did the socioeconomic profile of the gulf and the excellent synthesis of the legal and institutional network in the area. These and the able support of NEDA-Region I, the Philippine Council for Aquatic and Marine Research and Development of the Department of Science and Technology and International Center for Living Aquatic Resources Management (ICLARM) makes this profile the only published comprehensive documentation of Lingayen Gulf.