Fremantle /ˈfriːmæntəl/ is a major Australian port city in Western Australia, located at the mouth of the Swan River. Fremantle Harbour serves as the port of Perth, the state capital. Fremantle was the first area settled by the Swan River colonists in 1829. It was declared a city in 1929, and has a population of approximately 27,000.
The city is named after Captain Charles Fremantle, the English naval officer who established a camp at the site on 2 May 1829. The city contains well-preserved 19th century buildings and other heritage features. The Western Australian vernacular diminutive for Fremantle is Freo. The Nyungar name for the area is Walyallup.