Download coordinates as: The County of Hamley is a cadastral unit (i.e., a comprehensively surveyed and mapped division of land) located in the Australian state of South Australia covers land located in the state's east north of the Murray River, bordering New South Wales and Victoria.

[1][4] The county was proclaimed by Sir James Fergusson, 6th Baronet, the eighth Governor of South Australia on 18 February 1869.

[5] The Hundreds of Katarapko and Loveday are located next to each other at the southernmost end of the county and cover land within the area within the loop of the river between Cobdogla in the west, Barmera in the north, Loxton in the south and Berri in the east.

It covers an area of 160 square kilometres (61 sq mi) and its name is reported as being derived from Katarapko Creek which is located within the boundaries of the hundred.

It covers an area of 73 square kilometres (28 sq mi) and it is named after Ernest Alfred Loveday who was the "first Superintending Surveyor" for the state’s "Irrigation Department.