Mount Martha is a suburb of Melbourne on the Mornington Peninsula, located south of Melbourne City Centre. Its local government area is the Shire of Mornington Peninsula. It is on the south-eastern shores of Port Phillip and offers a bathing beach. A boardwalk winds its way for more than along the Balcombe Creek, its North beach mouth to the Briars Historic Park. The suburb's highest point bears the area's name and reaches . The peak was named in 1836 after Captain William Hobson’s mother, Martha Jones.