Mount Rat is a former subdivision in South Australia located in the locality of Wauraltee on the Yorke Peninsula.

[1] It is located near the junction of the Spencer Highway and Mount Rat Road about halfway between the centres of Maitland and Minlaton.

[1] It was first founded in the 1850s, and by 1882 had a school, hotel, blacksmiths, chapel and a large water tank.

[3] The success of the area in the growing of wheat helped to make the case for a much needed jetty at nearby Port Rickaby.

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