Warnbro is a southern outer suburb of Perth, the capital of Western Australia, located on Warnbro Sound within the City of Rockingham. It adjoins Port Kennedy which combines residential with retail and light-industrial land use. The suburb, which is named after Warnbro Sound, was gazetted on 5 April 1974. Secondary schools are the Warnbro Community High School which has about 1,600 students, and Living Waters Lutheran College, one of two Lutheran schools in Western Australia.