Polish Hill River is a locality in the Mid North region of South Australia, between the towns of Sevenhill and Mintaro. Running northward through the locality is the Hill River itself, discovered and named by Edward John Eyre in 1839 after John Hill, discoverer of the nearby Hutt River. Following earlier pastoralism, closer settlement began in the early 1850s, with the arrival of Irish Catholic migrants, including the Barry, Sullivan, Erwin, and Rochford families who were all from Glendalough, Wicklow. The first white child born at Hill River was James Erwin, in 1853.