Olongapo ([สoหloหล.ษกษหpo]), officially the City of Olongapo (Filipino: Lungsod ng Olongapo; Ilocano: Siudad ti Olongapo; Sambal: Siyodad nin Olongapo; Kapampangan: Lakanbalen/Ciudad ning Olongapo), is a highly urbanized city situated in the Central Luzon region of the Philippines. According to the 2024 census, it has a population of 264,903 people.
It is geographically situated and grouped under the province of Zambales by the Philippine Statistics Authority but governed independently and is also its largest city. Portions of the city also form part of the Subic Special Economic and Freeport Zone.
