The Division of Barker is an Australian Electoral Division in the south-east of South Australia. it includes the towns of Barmera, Berri, Bordertown, Keith, Kingston SE, Loxton, Mannum, Millicent, Mount Gambier, Murray Bridge, Naracoorte, Penola, Renmark, Tailem Bend, Waikerie, and parts of Nuriootpa and Tanunda. It was set up in 1903, and named for Collet Barker, who explored the mouth of the Murray River in 1831.