Blanchetown is in the traditional lands of the
Ngarrindjeri people. Blanchetown was originally surveyed in October 1855 as Blanche Town. It was named after Lady Blanche MacDonnell, the wife of the
Governor of South Australia,
Sir Richard MacDonnell. The Governor selected the site personally, to replace an earlier settlement of Murrundi (or Moorundee) - five kilometres downstream - which was subject to flooding. Murrundi had been chosen as the base of the
Protector of Aborigines by
Edward John Eyre since 1841. There had been a
ferry crossing at Blanchetown since 1869 (private before 1879, then government-run). In February 1876 Blanchetown was described as a "small but ambitious settlement, containing a dozen houses, and having a population of about 50 people". The buildings in the township were "substantially built of a stone quarried in the neighbourhood". The post and telegraph office, the hotel and store were described as "the main buildings". When land was first sold at Blanche Town it was on the "understanding that a railway should be made there, and some of the allotments consequently fetched as much as £1,200 per acre". By 1876, however, it was apparent that the railway would by-pass Blanchetown. It was reported that "the inhabitants regard the non-fulfillment of this promise as savouring of repudiation". The railway line connecting Adelaide with the town of
Morgan, upstream of Blanchetown, was opened in 1878. This development adversely affected the progress of Blanchetown and resulted in a decline of steamer traffic to the town. ==Heritage listings==