Thomas Simpson Hall (19 August 1808 – 28 May 1870) was an Anglo-Australian pastoralist who was at the forefront of British colonial expansion into what is now northern New South Wales and southern Queensland. He established large pastoral leases in these areas on Aboriginal lands and was subsequently involved in considerable frontier conflict with these original occupants. Hall was a pioneer of the British settlements of Dartbrook, Manilla, Bingara, Moree and Surat. He also became a leading breeder of Shorthorn cattle in Australia and developed a type of working dog called the Halls Heeler, from which the Australian cattle dog is descended.