Arthurs Seat is a mountainous and small locality on the Mornington Peninsula in Melbourne, Victoria, Australia, about 85 km south east of Melbourne's Central Business District, located within the Shire of Mornington Peninsula local government area. Arthurs Seat recorded a population of 414 at the 2021 census. Arthurs Seat is noted for its exclusivity and the general affluence of the demographics which make up the enclave. The Aboriginal Boonwurrung name for the hill is Wonga.