Hoyleton (formerly Hoyle's Plains) is a former railway town in South Australia, west of the Clare Valley, halfway between Leasingham and Halbury. At the 2006 census, Hoyleton had a population of 283. Hoyle's Plains was the original terminus of the Port Wakefield railway line. This was constructed in 1869 as a horse-drawn tramway to assist farmers on the newly settled Hoyles Plains to get their grain to the port. The Hoyleton Airbase to the west of the township is a base for firefighting aircraft to quickly respond to reports of fires in the Mid North region.