Eurelia is a town and locality in the Australian state of South Australia located on the east side of the Flinders Ranges about 264 kilometres (164 mi) north of the state capital of Adelaide and about 20 kilometres (12 mi) from the municipal seat of Orroroo.

Orroroo is a town in the Yorke and Mid North region of South Australia. At the 2016 census, the locality of Orroroo had a population of 610 while its urban centre had a population of 537. The Wilmington-Ucolta Road passes through here, intersecting with the RM Williams Way which leads to the Birdsville and Oodnadatta Tracks. The Peterborough–Quorn railway line extended from Peterborough to Orroroo also in 1881 and Quorn in 1882, connecting with the new Central Australia Railway from Port Augusta. These railways have now been abandoned. Orroroo is situated near Goyder's Line, a line drawn up in 1865 by Surveyor General Goyder which he believed indicated the edge of the area suitable for agriculture.