Peterhead is a north-western suburb of Adelaide 15 km from the CBD, on the Lefevre Peninsula, in the state of South Australia, Australia and falls under the City of Port Adelaide Enfield. It is adjacent to Largs Bay and Birkenhead. The postcode for Peterhead is 5016. It is bounded to the north by Wills Street, to the south by Hargrave Street and in the west and east by the Outer Harbor railway line and the Port River respectively.

Peterhead is serviced by Adelaide Metro train and bus services. The 150 bus to Adelaide (via Port Adelaide) and Osborne, services Fletcher Road. Peterhead railway station is located on the Outer Harbor railway line, which sits just south of the border on Hargrave street, Birkenhead.