The Santa Lucia Protected Landscape is a protected area located in the foothills of the Cordillera Central mountain range in the Ilocos Sur province of the Philippines. It protects an important watershed that serves as the water source for the surrounding communities in the municipality of Salcedo. It had an initial area of 174 hectares (430 acres) proclaimed as the Santa Lucia Watershed Forest Reserve in 1938 through Proclamation No. 333 issued by President Manuel Luis Quezon.