"+8" . "P473" . "Caoayan"@en . "Mayor"@en . "Caoayan is a fourth class municipality in the province of Ilocos Sur, Philippines. It links the first and second legislative ditricts of the province. According to the 2010 census, it has a population of 18,551 people."@en . . "1.742e+07"^^ . . "P281" . . . "18551"^^ . "Pardas Caoayan!" .