The Division of Mayo is an Australian electoral division in the hills east of Adelaide, South Australia. It includes the Adelaide Hills, Fleurieu Peninsula and Kangaroo Island, including the towns of Bridgewater, Crafers, Echunga, Gumeracha, Hahndorf, Langhorne Creek, Lobethal, Macclesfield, Mount Barker, Myponga, Oakbank, Stirling, Strathalbyn, Victor Harbor, Woodside, Yankalilla, and part of Birdwood.